Calibration test method and device for reflective phased array antenna

Abstract

The application discloses a calibration test method for a reflective phased array antenna, which includes the following steps. Step S10: Dismantle the spatial feed source that comes with the reflective phased array antenna. Step S20: Set an external feed source and test probe at the mid-field position to ensure that there is no obstruction between the test probe and the reflecting surface of the reflective phased array antenna; the mid-field position refers to 3 wavelengths to 10 wavelengths from the transmitting surface wavelength region. Step S30: Using an external feed source to bias the radiation feed to the reflective surface of the reflective phased array antenna, collect the radiation signal reflected by each element of the reflective surface of the reflective phased array antenna through the test probe, and The data collected by each array element is calibrated and trimmed so that the phases at the aperture planes of each array element are consistent. The application has the advantages of simple test method and calculation process, low calibration difficulty and high calibration accuracy.

Description

technical field [0001] The application relates to a calibration test method of a reflective phased array antenna. Background technique [0002] The reflective phased array antenna is a hybrid of a reflector antenna and a phased array antenna. It generally consists of a space feed and a reflector. The space feed is installed through a bracket to maintain Appropriate distance. The spatial feed is generally located directly in front of or to the side of the reflective surface. The reflective surface consists of an array of reflective elements, each of which can be individually phased 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, and there will inevitably be processing errors in the production and processing of the phased array antenna and the phase shift error of the phase shifter will cause the phase inconsistency of the phased array ...

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

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