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Calibration test method and device for reflective phased-array antenna

A technology for phased array antennas and testing methods, which is applied in transmitter monitoring, receiver monitoring, etc., and can solve the difficulties in calibration of reflective phased array antennas, difficulty in calibration of each channel of the antenna array, and inability to accurately collect amplitude and phase Value and other issues, the test method and calculation process are simple, the calibration difficulty is low, and the effect of eliminating the effect of occlusion

Active Publication Date: 2022-01-28
上海莱天通信技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of the space feed makes it difficult to calibrate the reflective phased array antenna directly by using the near-field scanning method, the rotation vector method, and the point-by-point scanning method (the calibration results are not accurate)
Especially for the reflective phased array antenna in the feedforward mode, the probe cannot accurately collect the amplitude and phase values ​​of each channel of the antenna array during calibration, and it is difficult to calibrate each channel of the antenna array

Method used

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  • Calibration test method and device for reflective phased-array antenna
  • Calibration test method and device for reflective phased-array antenna
  • Calibration test method and device for reflective phased-array antenna

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Embodiment Construction

[0025] see figure 1 , the calibration test method for a reflective phased array antenna proposed in this application includes the following steps.

[0026] Step S10: Remove the space feed source provided with the reflection type phased array antenna.

[0027] Step S20: Set an external feed source and a test probe at the midfield position to ensure that there is no obstruction between the test probe and the reflective surface (ie, the antenna front) of the reflective phased array antenna. The midfield position refers to an area from 3 wavelengths to 10 wavelengths away from the antenna front. The mid-field position has radiation near-field characteristics for the antenna array, and has approximate radiation far-field characteristics for each antenna element in the antenna array. For example, the external feed is located on the side of the test probe, and the two are separated by a certain distance.

[0028] The incident angle of the external feed to the center of the reflect...

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Abstract

The invention discloses a calibration test method of a reflective phased-array antenna. The calibration test method comprises the following steps of S10, removing a space feed source of the reflective phased-array antenna, S20, arranging an external feed source and a test probe at the midfield position, and ensuring that no shielding exists between the test probe and the reflecting surface of the reflective phased-array antenna, wherein the midfield position refers to an area which is 3-10 wavelengths away from the emission surface, and S30, adopting an external feed source to carry out offset radiation feed on the reflecting surface of the reflective phased-array antenna, collecting radiation signals reflected back by each array element of the reflecting surface of the reflective phased-array antenna through the test probe, and carrying out calibration trimming on data collected by each array element to enable phases at aperture surfaces of the array elements to be consistent. The method has the advantages of being simple in test method and calculation process, low in calibration difficulty and high in calibration precision.

Description

technical field [0001] The present application relates to a calibration and testing method of a reflective phased array antenna. Background technique [0002] The reflective phased array antenna is a mixture of a reflector antenna and a phased array antenna. It is generally composed of a space feed and a reflector. The space feed is installed through a bracket to maintain the reflector. appropriate distance. The spatial feed is generally located directly in front of or laterally in front of the reflective surface. The reflective surface consists of a set of reflective elements, each of which can be individually adjusted in phase to form a high-gain beam in the desired direction. [0003] The phase inconsistency between the channels of the phased array antenna will lead to problems such as low radiation efficiency. During the production and processing of the phased array antenna, there will inevitably be processing errors and the phase shift error of the phase shifter, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/11H04B17/21
CPCH04B17/11H04B17/21
Inventor 周建华曾卓毛小莲鲍坤
Owner 上海莱天通信技术有限公司
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