SJ 20583-1996 General specification for broadband antennas

SJ 20583-1996 General Specification for Broadband Antennas SJ20583-1996 Standard download decompression password: www.bzxz.net

Military Standard for Electronic Industry of the People's Republic of China FL5865
SJ20583-96
General Specification for Broadband Antennas1996-08-30 Issued
1997-01-01 Implementation
Approved by the Ministry of Electronics Industry of the People's Republic of China Military Standard for Electronic Industry of the People's Republic of China General Specification for Broadband Antennas
General Specification for Broadband Antennas1 Scope
1.1 Subject Content
SJ 20583-96
This specification specifies the general requirements, quality assurance regulations and delivery preparation for broadband antennas (hereinafter referred to as antennas). 1.2 Scope of Application
This specification applies to the design, production, inspection and delivery of low-gain antennas with an operating frequency range of 1 to 26 GHz and a bandwidth of 1.5:1, and is the basic basis for formulating antenna product specifications. 2 Reference documents
GB 2041-89
GB 3191—82
GB 3880--83
GB 11314--89
GB 11315—89
GB 113[6--89
GB 11449--89
GB 11450-89
GJB 150.1—86
GJR 150.2—86
GJB 150.5—86
GJR 150.9—86
GJB 150. 11--86
GJB 150.12—86
GIB 150.15—86
GIB 150.16—86
GJB 150.18--86
GJB 594—88
3 Requirements
Brass plate
Aluminum and aluminum alloy extruded bars
Aluminum and aluminum alloy plates
N-type RF coaxial connector
BNC-type RF coaxial connector
SMA-type RF sMA connector
Waveguide flange
Hollow metal waveguide
General principles for environmental test methods for military equipment
Environmental test methods for military equipmentLow pressure testEnvironmental test methods for military equipmentTemperature shock Test Military equipment environmental test methods Sensible heat test Military equipment environmental test force method Salt spray test Military equipment environmental test methods Sand and dust test Military equipment environmental test methods Acceleration test Military equipment environmental test methods Vibration test Military equipment environmental test methods Impact test Principles and thickness series for selection of metal coatings and chemical coatings Ministry of Electronics Industry of the People's Republic of China Issued on August 30, 1996 Implementation on January 1, 1997
KAONKAca-
31 Qualification Appraisal
SI 20583 96
Antennas submitted in accordance with this specification shall be products that have been qualified or approved for finalization. 3.2 Materials
3.2.1 The materials used for the antenna shall ensure that the antenna meets the requirements of this specification. The materials shall meet the requirements of its specifications. 3.2.2 Newly developed materials shall pass technical appraisal and be approved by the ordering party before they can be used. 3.2.3 Unless otherwise specified, aluminum alloy plates shall comply with the provisions of GB3880; aluminum alloy bars shall comply with the provisions of GB3191; brass plates shall comply with the provisions of GB2041. 3.3 Design
3.3.1 When designing the antenna, the contractor shall consider: a. The provisions of this specification and the product specification;
b. The actual use requirements of the ordering party;
c. The quality information feedback of each user unit on similar products. 3.3.2 The design of the antenna shall comply with the principles of generalization, serialization and combination, and standard parts shall be used to the maximum extent. 3.4 Junction
3.4.1 The feeder interface of the antenna can be coaxial, waveguide or other forms specified in the product specification. The RF coaxial connector shall comply with the provisions of GB 11314, GB 11315 and GB 11316, and the waveguide flange shall comply with the provisions of GR 11449 and GB 11450. 3.4.2 The antenna should have a mounting hole or other mounting methods that can ensure its normal use. 3.5 Size and weight
3.5.1 Without affecting the performance, it should be small in size and light in weight. 3.5.2 The specific indicators of the antenna size and weight should be clearly specified in its product specifications. 3.6 Surface quality
3.6.1 The outer surface of the antenna should be free of defects such as dents, bumps, deformation, etc.; the coating should not crack or fall off. 3.6.2 The selection principles and thickness of the metal coating layer and chemical coating layer of the wire should comply with the provisions of GJB594. 3.7 Marking
3.7.1 The antenna should generally have the following marks: a. Product model, name, factory (institute) date or number, manufacturer name or trademark; b. The packaging screws of the antenna should have packaging marks; c. The feeder port should have terminal codes.
3.7.2 If the antenna needs special marking, it should be specified in the design documents. 3.7.3 The marking shall be clear, legible and durable. 3.8 Performance Characteristics
3.8.1 Operating frequency band (see 4.7.7.1) The operating frequency band shall be specified in the product specification. 3.8.2 Gain (see 4.7.7.2)
Gain shall be specified in the product specification.
3.8.3 Voltage standing wave ratio (see 4.7.7.3) The voltage standing wave ratio shall be specified in the product specification. 3.8.4 Radiation pattern and beam width (see 4.7.7.4) The radiation pattern and beam width shall be specified in the product specification. 3.8.5 Circular polarization axial ratio (see 4.7.7.5) 2—
The circular polarization axial ratio shall be specified in the product specification. 3.9 Environmental requirements
3.9.1 Low pressure
SI20583--96
The test conditions for low pressure shall be selected in accordance with Chapter 2 of GIB150.2, and the specific requirements shall be specified by the product specifications. 3.9.2 Temperature shock
The temperature shock shall be selected in accordance with Chapter 2 of GJB150.5, and the specific requirements shall be specified by the product specifications. 3.9.3 Damp heat
The test conditions for heat shall be selected in accordance with Chapter 2 of GJB150.9, and the specific requirements shall be specified by the product specifications. 3.9.4 Salt spray
The test conditions for salt spray shall be selected in accordance with Chapter 2 of GJB150.11, and the specific requirements shall be specified by the product specifications. 3.9.5 Sand and dust
The test conditions for sand and dust shall be selected in accordance with Chapter 2 of GJB150.12, and the specific requirements shall be specified by the product specifications. 3.9.6 Acceleration
The test conditions for acceleration shall be selected in accordance with Chapter 2 of GJB150.15, and the specific requirements shall be specified by the product specifications. 3.9.7 Vibration
The test conditions for vibration shall be selected in accordance with Chapter A1 of Appendix A (Supplement) of GJB150.16, and the specific requirements shall be specified by the product specifications.
3.9.8 Impact
The test conditions for impact shall be selected according to the impact environment that may be encountered, and the relevant tests in "Test 10" to "Test 10" shall be selected in accordance with GJB150.18. The specific requirements shall be specified by the product specifications. 4 Quality Assurance Provisions
4.1 Inspection Responsibilities
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection items described in this specification. 4.1.1 Responsibility for Conformity
All products must comply with all requirements of Chapter 3 and Chapter 5 of this specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality outline. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Quality Quality consistency sampling does not allow the submission of antennas that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection classification
The inspections specified in this specification are divided into:
Construction. Identification inspection:
b, quality consistency inspection.
4.3 Inspection conditions
Unless otherwise specified, all inspections shall be carried out under the conditions specified in Articles 3.1 to 3.4 of GJB150.1. 4.4 Identification inspection
Identification inspection shall be carried out in any of the following circumstances: a. When the design is finalized or the production is finalized;
b. When the product is resumed after a long period of suspension:—3
TTTKAONTKAca-
SJ20583-96
c. When there are major changes in product design, manufacturing process, key components and materials. 4.4.1 Inspection samples
The number of products to be subjected to identification inspection is 2, which are randomly selected from the batch of products to be identified. 4.4.2 Inspection items and sequence
Unless otherwise specified, the inspection items of identification inspection shall be in accordance with the provisions of Table 1. The inspection sequence shall be specified by the product specification. 4.4.3 Qualification judgment
When all inspection items can meet the requirements of this specification, the identification inspection is judged to be qualified. If any inspection item does not meet the requirements of this specification, the inspection shall be stopped, and the unqualified items shall be analyzed to find out the cause of the defect and take corrective measures before continuing the inspection. If all inspection items meet the requirements of this specification, the identification inspection is still judged to be qualified.
4.4.4 Maintenance of identification qualification
In order to maintain the identification qualification, the contractor shall submit test data regularly according to the requirements of the ordering party. 4.5 Quality consistency inspection
4.5.1 Inspection grouping
Quality-consistency inspection is divided into two groups, A and C. 4.5.2 Group A inspection
4.5.2.1 Inspection items and sequence
The inspection items of Group A are shown in Table 2. The inspection sequence is specified by the product specifications. 4.5.2.2 Product submission
Inspection items
Dimensions and weight
Surface quality
Working band
Electromagnetic radiation ratio
Radiation pattern and beam width
Circular polarization axial ratio
Low pressure
Temperature shock
Acceleration
20 Packaging
Identification inspection
Quality consistency inspection
Requirements Chapter number
Inspection method Article number
Note: "０" indicates a required item; "一" indicates an item that is not to be done. SJ 2058396
Unless otherwise specified, Group A inspection shall be conducted by the contractor. The contractor shall provide the ordering party with relevant technical data and the equipment, instruments, tools and sites necessary for inspection. The antenna shall be submitted as a complete set and inspected and qualified by the contractor's quality inspection department, and shall be accompanied by a delivery notice and test records signed by the quality department.
4.5.2.3 Inspection method
Unless otherwise specified, Group A inspection shall be conducted by the ordering party with the cooperation of the contractor. 4.5.2.4 Sampling plan
Transmitters produced in batches or in single units shall pass Group A inspection. When the batch is not more than 20 units, full inspection shall be adopted: when the batch is more than 20 units, sampling inspection may be adopted, and the inspection method shall be clearly specified in the order contract. 4.5.2.5 Defect grade classification and quality judgment The defect grade classification and quality judgment shall be specified by the product specification or order contract. 4.5.2.6 Problem handling
The handling of quality problems shall comply with the provisions of GIB 74.9, Section 4, 7. 1.8. 4.5.2.7 Sample handling
Has passed the Group A inspection, the inspection batch is accepted, in this case, the defective transmitters meet the specified performance requirements after repair, and can be delivered according to the contract. 4.5.3 Group C inspection
4.5.3.1 Inspection items and sequence
The Group C inspection items are shown in Table 1, and the inspection sequence is specified by the product specification. 4.5.3.2 Cycle
Unless otherwise specified, the first submission of each production batch must undergo Group C inspection, at least once a year. Once for each order batch. When the order quantity is less than 5 units, the contractor and the ordering party may agree on the Group C inspection cycle separately and specify it in the order contract.
4.5.3.3 Timing
Generally, it is conducted after the Group A inspection is passed. 4.5.3.4 Inspection method
Group C inspection is conducted jointly by the contractor and the ordering party using the contractor's manpower and material resources, and the ordering party makes the final decision. 4.5.3.5 Sampling plan
The inspection samples shall be randomly selected from the transmitters that have passed the Group A inspection, and the sampling quantity is 2. When the order quantity is less than 5, only 1 is selected for inspection.
4.5.3.6 Defect determination
The defect level is determined according to the product specification. 4.5.3.7 Unqualified determination
If the following situations occur, it will be judged as unqualified: fatal defects are found;
The number of serious defects is greater than .
4.5.3.8 Problem handling
The handling of quality problems shall comply with the provisions of Article 4.7.3.7 of GIB74.9. 4.5.3.9 Sample handling
HYTKAONTKAca-
SI20583—96
For samples that have passed the C group inspection, the contractor shall make major repairs, replace all components that have short life and are indeed damaged during the test, and then re-test the A group. After passing the inspection, the products shall be delivered according to the contract. 4.5.4 Unqualified
If the sample fails the C group inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be re-conducted according to the opinions of the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the batch shall be rejected and the unqualified situation shall be notified to the superior appraisal agency.
4.6 Packaging Inspection
The inspection items of packaging inspection shall comply with the provisions of Chapter 8 of the National Military Standard (General Technical Requirements for Marking, Packaging, Transportation and Storage of Electronic Countermeasure Equipment).
4.7 Inspection Methods
4.7.1 Materials
Material inspection can be replaced by checking relevant verification data or certificates. 4.7.2 Design
Evaluate the design of the antenna according to the requirements of Article 3.3 and the requirements of the product specifications. 4.7.3 Structure
Use visual inspection or measuring tools to inspect the structure of the antenna according to the requirements of the product specifications. 4.7.4 Dimensions and Weight
Use measuring tools and scales to inspect the dimensions and weight of the wire according to the requirements of the product specifications and design documents. 4.7.5 Surface Quality
Inspect the surface condition of the wire by visual inspection, and inspect the surface coating quality according to the requirements of the product specifications and design documents. 4.7.6 Marking
Inspect by visual inspection according to the provisions of Article 3.7. 4.7.7 Performance Characteristics
4.7.7.1 Working Frequency Band
The inspection of the working frequency band shall be carried out during the inspection process of Articles 4.7.7.2-4.7.7.5. When the above inspection results meet the requirements, it can be determined that the working frequency band of the antenna meets the requirements of the station. 4.7.7.2 Gain
The inspection method of gain is shown in Chapter A1 of Appendix A (Supplement). 4.7.7.3 Voltage Standing Wave Ratio
The inspection method of voltage standing wave ratio is shown in Chapter A2 of Appendix A (Supplement). 4.7.7.4 Radiation Pattern and Beam Width
The inspection method of radiation pattern and beam width is shown in Chapter A3 of Appendix A (Supplement). 4.7.7.5 Circular polarization axial ratio
The inspection method of circular polarization axial ratio is shown in Chapter A4 of Appendix A (Supplement). 4.7.8 Environmental test
4.7.8.1 Low air fan
The test procedure of low air pressure test shall be carried out in accordance with Chapter 4 of GJB150.2. The items and requirements of initial test and final test shall be specified by the product specification.
4.7.8.2 Temperature shock
—6—
SJ 20583-96
The test procedure of temperature shock test shall be carried out in accordance with Chapter 4 of GJB 150.5. The items and requirements of initial test and final test shall be specified by the product specification.
4.7.8.3 Damp heat
The test procedure of damp heat test shall be carried out in accordance with Chapter 4 of GIB150.9. The items and requirements of initial test and final test shall be specified by the product specification.
4.7.8.4 Salt spray
The test procedure of salt spray test shall be carried out in accordance with the provisions of Chapter 4 of GJB150.11. The items and requirements of initial inspection and final inspection shall be specified by the product specification.
4.7.8.5 Sand and dust
The test procedure of sand and dust test shall be carried out in accordance with the provisions of Chapter 4 of B150.12. The items and requirements of initial inspection, intermediate inspection and final inspection shall be specified by the product specification.
4.7.8.6 Acceleration
The test procedure of acceleration test shall be carried out in accordance with the provisions of Chapter 4 of GJB150.15. The items and requirements of initial inspection and final inspection shall be specified by the product specification.
4.7.8.7 Vibration
The test procedure of vibration test shall be carried out in accordance with the procedures specified in Article A2.2 of Appendix A (Supplement) of GJB 150.16. The items and requirements for the initial test, intermediate test and final test shall be specified by the product specification. 4.7.8.8 The test procedure for the impact test shall be carried out in accordance with the provisions of Chapter 4 of the test in GJB150.18. The items and requirements for the initial test and final test shall be specified by the product specification. 4.7.9 Packaging
The inspection method for antenna packaging can refer to Appendix B (supplement) of the National Military Standard (General Technical Requirements for Marking, Packaging, Transportation and Storage of Electronic Countermeasure Equipment), and shall be stipulated by the product specifications. 5 Delivery Preparation
5.1 Packaging
5.1.1 Antenna Unit Packaging
The requirements for antenna unit packaging are as follows:
a. After the antenna unit is packaged, it should be placed in a wooden or fiberboard packaging box; b. Each antenna unit package should be accompanied by a product certificate. The certificate should indicate the antenna model, name, manufacturer (institute), production date, seal of the technical inspection department, etc. 5.1.2 Packaging
The requirements for antenna packaging are as follows:
a. After the antenna unit is packaged, it should be placed in a wooden or fiberboard packaging box; b. Fixing and shockproof measures should be taken for the antenna; C. Each packing box should be accompanied by a packing list, which should indicate the antenna model, name, product specification number, manufacturer (institute), packing quantity, packing date, etc.; d. The packing box should have storage and transportation icons such as "upward", "moisture-proof" and "handle with care". 5.2 Transportation
The packaged antenna can be transported by any means of transportation. It should be protected from rain and mechanical collision during transportation. 7—
HTTKAONTKAca-
B Storage
SI 20583-96
Antennas packed in boxes should be stored in a warehouse with an ambient temperature of -10 to 40°C, a relative humidity of no more than 80%, and no active chemical gases around.
6 Notes
6.1 Intended use
Antennas specified in this specification are intended for use in radar countermeasures, radar, communications and measurement and control systems. 2 Contents of ordering documents
The contract or order form shall indicate the following: the name, number and date of this specification;
The product specification name, number and date of the antenna: b.
c. Name, model and order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna testing should be carried out in a microwave darkroom or a free space test field. The test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Wu (A1)(A2): R—-
-Test distance between the antenna to be tested and the auxiliary antenna, mD—--Auxiliary antenna aperture size, m: d--Auxiliary antenna aperture size, m;
I--Working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
Current generator
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Specially cut antenna
a, the antenna to be tested and the standard gain antenna are 180 degrees in the opposite direction and are installed on the turntable through the rotating shaft so that their maximum radiation direction is 9
TKAOIKAca-
SI 20583-96
Aim at the auxiliary antenna in the direction of the test antenna and the standard gain antenna respectively. The polarization direction of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not greater than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measurement receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain antenna: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution is better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test point should meet the requirements of the antenna product specification. Generally, there should be no less than 5 test points within one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the test point, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver alternate with A1.2.4.4, and record the attenuation of the attenuator at this time Ax1. If the antenna to be tested is an elliptically polarized antenna, the auxiliary antenna polarization needs to be continuously rotated to find the maximum and minimum values ​​of the power level indication of the measurement receiver respectively, and adjust the clipping amount of the variable attenuator to make the power level indication of the antenna measurement receiver the same as that in A1.2.4.4. Record the attenuation of the attenuator at this time Ax2cA1.2.4.6 respectively. Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.2.4.2 to A1.2.4.5 to complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the standard gain antenna, dB:
As,Ax: Ax is the attenuation of the attenuator, dB. 41.3 Test method 2 (two identical lines test) A1.3.1 Test system diagram
The test system diagram is shown in Figure A2. The antenna A to be tested and the antenna B to be tested must be polarized and matched: — 10
++++++++++(A4)
A1.3.2 Test equipment
SJ20583-96
Test equipment requirements are as follows:
a. Signal generator: stable output power: allowed;
h. Measurement receiver: sensitivity better than -60dBm; c. Computer, PC, standard configuration.
A1.3.3 Test steps
Antenna to be tested
Measure receiving power
A1.3.3.1 Set up the traces A and B at the same height, and align the maximum radiation direction of the two antennas, with the same polarization direction.
A1.3.3.2 Same as A1.2.4.1.
A1.3.3.3 Same as A1.2.4.2.
A1.3.3.4 Same as A1.2.4.3.
A1.3.3.5 Note down the transmitting power P of the antenna A to be tested and the receiving power Pr of the antenna B to be tested. A1.3.3.6 Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.3.3.4 to A1.3.3.5 to complete the test of each frequency test point.
A1.3.4 Data processing
The gain of the antenna to be tested is calculated according to formula (A5): GA G = 0.5[20lg(4 yuan R/a) - 10lg(Po/P)] Where: GA, G—gain of the antenna to be tested, dB; P—transmitting power of the antenna A to be tested, mW; P—receiving power of the antenna B to be tested, mW: R——the distance between the two large lines to be tested, m;
A Working wavelength, ma
A2 Voltage standing wave ratio
A2.1 Test environment
Reflectors should be avoided in the vicinity of the antenna to be tested. A2.2 Test system diagram
The test system diagram is shown in Figure A3.
...(AS)
TYKAOIKAca-1 Antenna unit packaging
The requirements for antenna unit packaging are as follows:
a. After antenna unit packaging, it should be placed in a wooden or fiberboard packaging box; b. Each antenna unit package should be accompanied by a product certificate. The certificate should indicate the antenna model, name, manufacturer (institute), production date, technical inspection department seal, etc. 5.1.2 Packing
The requirements for antenna packing are as follows:
a. After antenna unit packaging, it should be placed in a wooden or fiberboard packaging box; b. Fixing and shockproof measures should be taken for the antenna; C. Each packing box should be accompanied by a packing list, which should indicate the antenna model, name, product specification number, manufacturer (institute), packing quantity, packing date, etc.; d. The packing box should have storage and transportation icons such as "upward", "moisture-proof" and "handle with care". 5.2 Transportation
The packaged antenna can be transported by any means of transportation. It should be protected from rain and mechanical collision during transportation. 7—
HTTKAONTKAca-
B Storage
SI 20583-96
Antennas packed in boxes should be stored in a warehouse with an ambient temperature of -10 to 40°C, a relative humidity of no more than 80%, and no active chemical gases around.
6 Notes
6.1 Intended use
Antennas specified in this specification are intended for use in radar countermeasures, radar, communications and measurement and control systems. 2 Contents of ordering documents
The contract or order form shall indicate the following: the name, number and date of this specification;
The product specification name, number and date of the antenna: b.
c. Name, model and order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna testing should be carried out in a microwave darkroom or a free space test field. The test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Wu (A1)(A2): R—-
-Test distance between the antenna to be tested and the auxiliary antenna, mD—--Auxiliary antenna aperture size, m: d--Auxiliary antenna aperture size, m;
I--Working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
Current generator
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Specially cut antenna
a, the antenna to be tested and the standard gain antenna are 180 degrees in the opposite direction and are installed on the turntable through the rotating shaft so that their maximum radiation direction is 9
TKAOIKAca-
SI 20583-96
Aim at the auxiliary antenna in the direction of the test antenna and the standard gain antenna respectively. The polarization direction of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not greater than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measurement receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain antenna: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution is better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test point should meet the requirements of the antenna product specification. Generally, there should be no less than 5 test points within one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the test point, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver alternate with A1.2.4.4, and record the attenuation of the attenuator at this time Ax1. If the antenna to be tested is an elliptically polarized antenna, the auxiliary antenna polarization needs to be continuously rotated to find the maximum and minimum values ​​of the power level indication of the measurement receiver respectively, and adjust the clipping amount of the variable attenuator to make the power level indication of the antenna measurement receiver the same as that in A1.2.4.4. Record the attenuation of the attenuator at this time Ax2cA1.2.4.6 respectively. Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.2.4.2 to A1.2.4.5 to complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the standard gain antenna, dB:
As,Ax: Ax is the attenuation of the attenuator, dB. 41.3 Test method 2 (two identical lines test) A1.3.1 Test system diagram
The test system diagram is shown in Figure A2. The antenna A to be tested and the antenna B to be tested must be polarized and matched: — 10
++++++++++(A4)
A1.3.2 Test equipment
SJ20583-96
Test equipment requirements are as follows:
a. Signal generator: stable output power: allowed;
h. Measurement receiver: sensitivity better than -60dBm; c. Computer, PC, standard configuration.
A1.3.3 Test steps
Antenna to be tested
Measure receiving power
A1.3.3.1 Set up the traces A and B at the same height, and align the maximum radiation direction of the two antennas, with the same polarization direction.
A1.3.3.2 Same as A1.2.4.1.
A1.3.3.3 Same as A1.2.4.2.
A1.3.3.4 Same as A1.2.4.3.
A1.3.3.5 Note down the transmitting power P of the antenna A to be tested and the receiving power Pr of the antenna B to be tested. A1.3.3.6 Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.3.3.4 to A1.3.3.5 to complete the test of each frequency test point.
A1.3.4 Data processing
The gain of the antenna to be tested is calculated according to formula (A5): GA G = 0.5[20lg(4 yuan R/a) - 10lg(Po/P)] Where: GA, G—gain of the antenna to be tested, dB; P—transmitting power of the antenna A to be tested, mW; P—receiving power of the antenna B to be tested, mW: R——the distance between the two large lines to be tested, m;
A Working wavelength, ma
A2 Voltage standing wave ratio
A2.1 Test environment
Reflectors should be avoided in the vicinity of the antenna to be tested. A2.2 Test system diagram
The test system diagram is shown in Figure A3.
...(AS)
TYKAOIKAca-1 Antenna unit packaging
The requirements for antenna unit packaging are as follows:
a. After antenna unit packaging, it should be placed in a wooden or fiberboard packaging box; b. Each antenna unit package should be accompanied by a product certificate. The certificate should indicate the antenna model, name, manufacturer (institute), production date, technical inspection department seal, etc. 5.1.2 Packing
The requirements for antenna packing are as follows:
a. After antenna unit packaging, it should be placed in a wooden or fiberboard packaging box; b. Fixing and shockproof measures should be taken for the antenna; C. Each packing box should be accompanied by a packing list, which should indicate the antenna model, name, product specification number, manufacturer (institute), packing quantity, packing date, etc.; d. The packing box should have storage and transportation icons such as "upward", "moisture-proof" and "handle with care". 5.2 Transportation
The packaged antenna can be transported by any means of transportation. It should be protected from rain and mechanical collision during transportation. 7—
HTTKAONTKAca-
B Storage
SI 20583-96
Antennas packed in boxes should be stored in a warehouse with an ambient temperature of -10 to 40°C, a relative humidity of no more than 80%, and no active chemical gases around.
6 Notes
6.1 Intended use
Antennas specified in this specification are intended for use in radar countermeasures, radar, communications and measurement and control systems. 2 Contents of ordering documents
The contract or order form shall indicate the following: the name, number and date of this specification;
The product specification name, number and date of the antenna: b.
c. Name, model and order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna testing should be carried out in a microwave darkroom or a free space test field. The test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Wu (A1)(A2): R—-
-Test distance between the antenna to be tested and the auxiliary antenna, mD—--Auxiliary antenna aperture size, m: d--Auxiliary antenna aperture size, m;
I--Working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
Current generator
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Specially cut antenna
a, the antenna to be tested and the standard gain antenna are 180 degrees in the opposite direction and are installed on the turntable through the rotating shaft so that their maximum radiation direction is 9
TKAOIKAca-
SI 20583-96
Aim at the auxiliary antenna in the direction of the test antenna and the standard gain antenna respectively. The polarization direction of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not greater than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measurement receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain antenna: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution is better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test point should meet the requirements of the antenna product specification. Generally, there should be no less than 5 test points within one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the test point, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver alternate with A1.2.4.4, and record the attenuation of the attenuator at this time Ax1. If the antenna to be tested is an elliptically polarized antenna, the auxiliary antenna polarization needs to be continuously rotated to find the maximum and minimum values ​​of the power level indication of the measurement receiver respectively, and adjust the clipping amount of the variable attenuator to make the power level indication of the antenna measurement receiver the same as that in A1.2.4.4. Record the attenuation of the attenuator at this time Ax2cA1.2.4.6 respectively. Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.2.4.2 to A1.2.4.5 to complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the standard gain antenna, dB:
As,Ax: Ax is the attenuation of the attenuator, dB. 41.3 Test method 2 (two identical lines test) A1.3.1 Test system diagram
The test system diagram is shown in Figure A2. The antenna A to be tested and the antenna B to be tested must be polarized and matched: — 10
++++++++++(A4)
A1.3.2 Test equipment
SJ20583-96
Test equipment requirements are as follows:
a. Signal generator: stable output power: allowed;
h. Measurement receiver: sensitivity better than -60dBm; c. Computer, PC, standard configuration.
A1.3.3 Test steps
Antenna to be tested
Measure receiving power
A1.3.3.1 Set up the traces A and B at the same height, and align the maximum radiation direction of the two antennas, with the same polarization direction.
A1.3.3.2 Same as A1.2.4.1.
A1.3.3.3 Same as A1.2.4.2.
A1.3.3.4 Same as A1.2.4.3.
A1.3.3.5 Note down the transmitting power P of the antenna A to be tested and the receiving power Pr of the antenna B to be tested. A1.3.3.6 Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.3.3.4 to A1.3.3.5 to complete the test of each frequency test point.
A1.3.4 Data processing
The gain of the antenna to be tested is calculated according to formula (A5): GA G = 0.5[20lg(4 yuan R/a) - 10lg(Po/P)] Where: GA, G—gain of the antenna to be tested, dB; P—transmitting power of the antenna A to be tested, mW; P—receiving power of the antenna B to be tested, mW: R——the distance between the two large lines to be tested, m;
A Working wavelength, ma
A2 Voltage standing wave ratio
A2.1 Test environment
Reflectors should be avoided in the vicinity of the antenna to be tested. A2.2 Test system diagram
The test system diagram is shown in Figure A3.
...(AS)
TYKAOIKAca-2 Packing
The requirements for antenna packing are as follows:
a: After the antenna unit is packed, it should be packed in a wooden or fiberboard packing box; b. Measures should be taken to fix and shockproof the antenna; C. Each packing box should be accompanied by a packing list, which should indicate the antenna model, name, product specification number, manufacturer (institute), packing quantity, packing date, etc.; d. The packing box should have storage and transportation icons such as "upward", "moisture-proof" and "handle with care". 5.2 Transportation
The packaged antenna can be transported by any means of transportation. Rain and mechanical collision should be avoided during transportation. 7—
HTTKAONTKAca-
B Storage
SI 20583-96
Antennas packed in boxes should be stored in a warehouse with an ambient temperature of -10 to 40°C, a relative humidity of no more than 80%, and no active chemical gases around.
6 Notes
6.1 Intended use
Antennas specified in this specification are intended for use in radar countermeasures, radar, communications and measurement and control systems. 2 Contents of ordering documents
The contract or order form shall indicate the following: the name, number and date of this specification;
The product specification name, number and date of the antenna: b.
c. Name, model and order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna testing should be carried out in a microwave darkroom or a free space test field. The test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Wu (A1)(A2): R—-
-Test distance between the antenna to be tested and the auxiliary antenna, mD—--Auxiliary antenna aperture size, m: d--Auxiliary antenna aperture size, m;
I--Working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
Current generator
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Specially cut antenna
a, the antenna to be tested and the standard gain antenna are 180 degrees in the opposite direction and are installed on the turntable through the rotating shaft so that their maximum radiation direction is 9
TKAOIKAca-
SI 20583-96
Aim at the auxiliary antenna in the direction of the test antenna and the standard gain antenna respectively. The polarization direction of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not greater than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measurement receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain antenna: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution is better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test point should meet the requirements of the antenna product specification. Generally, there should be no less than 5 test points within one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the test point, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver alternate with A1.2.4.4, and record the attenuation of the attenuator at this time Ax1. If the antenna to be tested is an elliptically polarized antenna, the auxiliary antenna polarization needs to be continuously rotated to find the maximum and minimum values ​​of the power level indication of the measurement receiver respectively, and adjust the clipping amount of the variable attenuator to make the power level indication of the antenna measurement receiver the same as that in A1.2.4.4. Record the attenuation of the attenuator at this time Ax2cA1.2.4.6 respectively. Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.2.4.2 to A1.2.4.5 to complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the standard gain antenna, dB:
As,Ax: Ax is the attenuation of the attenuator, dB. 41.3 Test method 2 (two identical lines test) A1.3.1 Test system diagram
The test system diagram is shown in Figure A2. The antenna A to be tested and the antenna B to be tested must be polarized and matched: — 10
++++++++++(A4)
A1.3.2 Test equipment
SJ20583-96
Test equipment requirements are as follows:
a. Signal generator: stable output power: allowed;
h. Measurement receiver: sensitivity better than -60dBm; c. Computer, PC, standard configuration.
A1.3.3 Test steps
Antenna to be tested
Measure receiving power
A1.3.3.1 Set up the traces A and B at the same height, and align the maximum radiation direction of the two antennas, with the same polarization direction.
A1.3.3.2 Same as A1.2.4.1.
A1.3.3.3 Same as A1.2.4.2.
A1.3.3.4 Same as A1.2.4.3.
A1.3.3.5 Note down the transmitting power P of the antenna A to be tested and the receiving power Pr of the antenna B to be tested. A1.3.3.6 Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.3.3.4 to A1.3.3.5 to complete the test of each frequency test point.
A1.3.4 Data processing
The gain of the antenna to be tested is calculated according to formula (A5): GA G = 0.5[20lg(4 yuan R/a) - 10lg(Po/P)] Where: GA, G—gain of the antenna to be tested, dB; P—transmitting power of the antenna A to be tested, mW; P—receiving power of the antenna B to be tested, mW: R——the distance between the two large lines to be tested, m;
A Working wavelength, ma
A2 Voltage standing wave ratio
A2.1 Test environment
Reflectors should be avoided in the vicinity of the antenna to be tested. A2.2 Test system diagram
The test system diagram is shown in Figure A3.
...(AS)
TYKAOIKAca-2 Packing
The requirements for antenna packing are as follows:
a: After the antenna unit is packed, it should be packed in a wooden or fiberboard packing box; b. Measures should be taken to fix and shockproof the antenna; C. Each packing box should be accompanied by a packing list, which should indicate the antenna model, name, product specification number, manufacturer (institute), packing quantity, packing date, etc.; d. The packing box should have storage and transportation icons such as "upward", "moisture-proof" and "handle with care". 5.2 Transportation
The packaged antenna can be transported by any means of transportation. Rain and mechanical collision should be avoided during transportation. 7—
HTTKAONTKAca-
B Storage
SI 20583-96
Antennas packed in boxes should be stored in a warehouse with an ambient temperature of -10 to 40°C, a relative humidity of no more than 80%, and no active chemical gases around.
6 Notes
6.1 Intended use
Antennas specified in this specification are intended for use in radar countermeasures, radar, communications and measurement and control systems. 2 Contents of ordering documents
The contract or order form shall indicate the following: the name, number and date of this specification;
The product specification name, number and date of the antenna: b.
c. Name, model and order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna testing should be carried out in a microwave darkroom or a free space test field. The test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Wu (A1)(A2): R—-
-Test distance between the antenna to be tested and the auxiliary antenna, mD—--Auxiliary antenna aperture size, m: d--Auxiliary antenna aperture size, m;
I--Working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
Current generator
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Specially cut antenna
a, the antenna to be tested and the standard gain antenna are 180 degrees in the opposite direction and are installed on the turntable through the rotating shaft so that their maximum radiation direction is 9
TKAOIKAca-
SI 20583-96
Aim at the auxiliary antenna in the direction of the test antenna and the standard gain antenna respectively. The polarization direction of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not greater than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measurement receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain antenna: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution is better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test point should meet the requirements of the antenna product specification. Generally, there should be no less than 5 test points within one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the test point, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator, make the power level indication of the antenna measurement receiver alternate with A1.2.4.4, and record the attenuation of the attenuator at this time Ax1. If the antenna to be tested is an elliptically polarized antenna, the auxiliary antenna polarization needs to be continuously rotated to find the maximum and minimum values ​​of the power level indication of the measurement receiver respectively, and adjust the clipping amount of the variable attenuator to make the power level indication of the antenna measurement receiver the same as that in A1.2.4.4. Record the attenuation of the attenuator at this time Ax2cA1.2.4.6 respectively. Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.2.4.2 to A1.2.4.5 to complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the standard gain antenna, dB:
As,Ax: Ax is the attenuation of the attenuator, dB. 41.3 Test method 2 (two identical lines test) A1.3.1 Test system diagram
The test system diagram is shown in Figure A2. The antenna A to be tested and the antenna B to be tested must be polarized and matched: — 10
++++++++++(A4)
A1.3.2 Test equipment
SJ20583-96
Test equipment requirements are as follows:Www.bzxZ.net
a. Signal generator: stable output power: allowed;
h. Measurement receiver: sensitivity better than -60dBm; c. Computer, PC, standard configuration.
A1.3.3 Test steps
Antenna to be tested
Measure receiving power
A1.3.3.1 Set up the traces A and B at the same height, and align the maximum radiation direction of the two antennas, with the same polarization direction.
A1.3.3.2 Same as A1.2.4.1.
A1.3.3.3 Same as A1.2.4.2.
A1.3.3.4 Same as A1.2.4.3.
A1.3.3.5 Note down the transmitting power P of the antenna A to be tested and the receiving power Pr of the antenna B to be tested. A1.3.3.6 Change the operating frequency of the signal generator according to the frequency test point, repeat steps A1.3.3.4 to A1.3.3.5 to complete the test of each frequency test point.
A1.3.4 Data processing
The gain of the antenna to be tested is calculated according to formula (A5): GA G = 0.5[20lg(4 yuan R/a) - 10lg(Po/P)] Where: GA, G—gain of the antenna to be tested, dB; P—transmitting power of the antenna A to be tested, mW; P—receiving power of the antenna B to be tested, mW: R——the distance between the two large lines to be tested, m;
A Working wavelength, ma
A2 Voltage standing wave ratio
A2.1 Test environment
Reflectors should be avoided in the vicinity of the antenna to be tested. A2.2 Test system diagram
The test system diagram is shown in Figure A3.
...(AS)
TYKAOIKAca-
c. Name, model, order quantity of the gateway; special requirements for the gateway.
SJ 20583-96
Test methods for main parameters of broadband antennas
(Supplement)
The test methods for main parameters given in this appendix are only applicable to medium and low gain antennas with operating frequencies within the range of 1~~26.5GHz, relative bandwidth greater than .5:1 or absolute bandwidth greater than 6GHz. The test methods for main parameters of other antennas should be specified in the product specifications.
A1 Gain
A1.1 Test environment
Antenna test should be carried out in a microwave darkroom or free space test field, and the test distance between the transmitting and receiving lines should meet the requirements of (AI) and (A2) at the same time:
R>2(d + D)/α
Where (A1)(A2): R—-
-test distance between the antenna to be tested and the auxiliary antenna, mD—--the aperture size of the auxiliary antenna, m: d--the aperture size of the antenna to be tested, m;
I--the working wavelength, m.
A1.2 Test method 1 (comparative test method) A1.2.1 Test system diagram
The test system diagram is shown in Figure Al.
Agent receiver
A1.2.2 Antenna installation device
Variable attenuation
Stationary antenna
Standard gain antenna
The requirements for the antenna installation device are as follows:
Special antenna
a. The antenna to be tested and the standard gain antenna are 180 degrees opposite and installed on the turntable through the rotating shaft, so that their maximum radiation directions are respectively aligned with the auxiliary antenna. The polarization directions of the antenna to be tested and the standard gain antenna must be consistent; b. An isolation screen made of microwave absorbing material should be installed between the antenna to be tested and the standard gain antenna; c. The gain difference between the antenna to be tested and the standard gain antenna is generally not more than 15dB. A1.2.3 Test equipment
The requirements for the test equipment are as follows:
a. Signal generator: stable output power
b. Variable attenuator: error less than =0.2dBc, measuring receiver: sensitivity better than -60dBm; d. Auxiliary antenna and standard gain line: linear polarization, the operating frequency meets the requirements of the antenna to be tested; e: Turntable: azimuth rotation step resolution better than 0.2A1,2.4 Test steps
A1.2.4.1 Power on the test system and preheat it according to the specified time. A1,2.4.2 The setting of the frequency test points shall meet the requirements of the antenna product specifications. Generally, there should be no less than 5 test points in one octave.
A1.2.4.3 Select the operating frequency of the signal generator according to the number of test points, and increase its output power to an appropriate level. A1.2.4.4 Align the standard gain antenna with the auxiliary line, adjust the attenuation of the variable attenuator to the maximum, so that the power level indicator of the antenna measurement receiver is at the appropriate position, and record the attenuation of the attenuator at this time. 41.2.4.5 Rotate the turntable 180° to align the antenna to be tested with the auxiliary antenna, adjust the attenuation of the variable attenuator so that the power level indication of the antenna measurement receiver is alternate with that of A1.2.4.4, and record the attenuation of the attenuator Ax1 at this time. If the antenna to be tested is an elliptically polarized antenna, the polarization of the auxiliary antenna needs to be rotated continuously, and the maximum and minimum values ​​of the power level indication of the measurement receiver are found respectively, and the reduction amount of the variable attenuator is adjusted so that the power level indication of the antenna measurement receiver is the same as that of A1.2.4.4, and record the attenuation of the attenuator Ax2c at this time respectively. A1.2.4.6 Change the operating frequency of the signal generator according to the frequency test point, repeat the steps of A1.2.4.2 to A1.2.4.5, and complete the test of each frequency test point. A1.2.5 Data processing
The gain of the line to be tested is calculated according to formula (A3) (A4): For linearly polarized antenna:
Gx - G.+ Axi - As
For elliptically polarized antenna:
Gx = Gs + AxI - As + 10lg(I + 10(Ax2 - Axi)/10) In formulas (A3) and (A4): Gx is the gain of the line to be tested, dB; Gs is the gain of the st
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.