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A phased array antenna active reflection coefficient testing system and method

A technology of phased array antenna and reflection coefficient, which is applied in the direction of radio wave measurement system, instrument, etc., can solve the problems of heavy workload, poor engineering realization, cumbersome test connection work, etc.

Active Publication Date: 2017-10-03
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) The test cannot reflect the actual working state of the phased array antenna. Only one antenna unit is in the feeding state at a certain moment during the test, which is inconsistent with the simultaneous feeding state of the phased array antenna unit. The test results cannot truthfully reflect the actual state of the antenna array (2) A large number of mutual coupling parameter tests need to be completed to obtain the active reflection coefficient of each antenna unit. The test connection work is cumbersome, the workload is heavy, and the test efficiency is low. For large-scale phase control (3) The above method cannot realize the amplitude-phase conversion control of multi-channel feed excitation signals, and cannot effectively reflect the active reflection coefficient of the phased array antenna under different excitation and feed states.

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  • A phased array antenna active reflection coefficient testing system and method
  • A phased array antenna active reflection coefficient testing system and method
  • A phased array antenna active reflection coefficient testing system and method

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Embodiment 1

[0043] Such as figure 2 As shown, a phased array antenna active reflection coefficient test system includes a vector network analyzer 1, a multi-channel amplitude and phase control sub-unit 2, a signal extraction sub-unit 3, a main control computer 4, a calibrator 5 and a stable amplitude and phase cable 6; where,

[0044] The vector network analyzer 1 is the host for signal generation and reception processing, used to generate test excitation signals, receive reference, reflection and monitoring signals, and select market-mature products in corresponding frequency bands according to test frequency requirements.

[0045] The multi-channel amplitude and phase control extension 2 is configured to realize the conversion of the test excitation signal from 1 channel to M channels, the independent amplitude and phase control of the M channel signals, and finally realize the output of the M channel amplitude and phase controllable excitation signals.

[0046] Here, M refers to the ...

Embodiment 2

[0071] A kind of phased array antenna active reflection coefficient test method in the present embodiment 2 adopts the phased array antenna active reflection coefficient test system in embodiment 1, and this method comprises the following steps:

[0072] Port 1 of the vector network analyzer outputs an excitation signal with a set frequency and power, and the signal enters the input interface 25 of the amplitude-phase control extension 2, and after being divided by 21 power points in the M-way power dividing network, each signal is adjusted in amplitude and phase and amplified in power , enter the signal extraction extension 3, after the independent amplitude and phase adjusted M-channel signals pass through the coupling network 31, the through signal is fed to the antenna array under test. At this time, the M antenna units are in the feeding state at the same time, and each antenna unit The amplitude and phase of the received feed signal are independently controllable, so the ...

Embodiment 3

[0075] An extension calibration method of a phased array antenna active reflection coefficient test system in Embodiment 3 is aimed at the phased array antenna active reflection coefficient test system in Embodiment 1, and its purpose is to complete the multi-channel amplitude and phase control extension , Signal extraction extension, system cable amplitude and phase calibration.

[0076] Calibration process such as Figure 5 Shown: First, the system is turned on and warmed up, and then the two-port calibration of the vector network analyzer is completed; Figure 6 Complete the calibration connection of each device in the system; set the operating frequency of the vector network analyzer 1 to the operating frequency of the active reflection coefficient index test of the phased array antenna, and the power to the power value during the test; set the test parameters of the vector network analyzer 1 S21 and R2 / R1, where S21 represents the amplitude and phase information of the e...

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Abstract

The invention discloses a phased array antenna active reflection coefficient testing system and method. The test system includes a vector network analyzer, a multi-channel amplitude and phase control extension, a signal extraction extension, a main control computer, a calibration component and an amplitude and phase stabilization cable; wherein the vector network analyzer is configured to generate a test excitation signal, Receive reference, reflection and monitoring signals; the multi-channel amplitude and phase control extension is configured to realize the conversion of test excitation signals from 1 channel to M channels, independent amplitude and phase control of M channels, and finally realize the controllable excitation of M channels Signal output; the signal extraction extension is configured to realize straight-through output of M-channel amplitude-phase controllable excitation signal, reference coupling, monitoring coupling, reflection coupling extraction, switch control and selection output of M-channel amplitude-phase controllable excitation signal. The test system of the invention can directly test the active reflection coefficient of the antenna unit without calculation, the test process is simple, the manual operation is less, and the test result has high authenticity.

Description

technical field [0001] The invention relates to a phased array antenna active reflection coefficient testing system and method. Background technique [0002] With the development of phased array radar, phased array antenna has been widely used due to its advantages of various feeding methods, flexible beam control, and fast scanning speed. When the phased array antenna is working, the combination of different amplitude and phase feeds of multiple antenna elements is used to realize beamforming and pointing control. This working mode brings the following problems: [0003] (1) Because the antenna units at the front end of the array are relatively close, the electromagnetic mutual coupling effect between them will affect the antenna impedance, thereby reducing the performance of the entire antenna array; (2) In the actual working state of the phased array antenna, the antenna array exists A variety of feeding methods of amplitude and phase combinations, different feeding met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 常庆功王乃志王亚海
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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