An Antenna Phase Center Test System with North Pointing Function

Abstract

The invention discloses an antenna phase center testing system with north pointing function, comprising a turntable, a control module, a user receiver, and a data processing module; Cavity, a fixture for installing the antenna; the stepper motor receives the instructions sent by the control module, and controls the antenna installed on the fixture to rotate to the set angle through the worm gear, and the user receiver obtains the satellite navigation sent by the antenna rotated to the set angle The signal, data processing module calculates the antenna phase center according to the satellite navigation signal obtained by the user receiver; this solution realizes the accurate north finding of the antenna, realizes the unmanned test mode of the antenna phase center of the baseline field, and completes the manual test to the automatic test. Upgrade and change, improve test work efficiency, reduce test costs, and make the management of on-site test work simpler and more effective.

Description

technical field [0001] The invention relates to an antenna phase center testing system with north pointing function, belonging to the technical field of antenna phase center testing. Background technique [0002] The antenna phase center (average antenna phase center) refers to the electrical center of the microwave antenna. Its theoretical design should be consistent with the geometric center of the antenna. The difference between the antenna phase center and the geometric center is called the antenna phase center deviation. The test of the antenna phase center requires that the north-pointing marks on all the antennas to be tested point to true north at the same time during the test. In the first measurement section, the antennas under test all point to the north and observe for a period of time (1.5h); then fix the antenna G1, rotate the other antenna G2 clockwise, rotate 90°, 180°, and 270° in turn, and then measure for 3 periods. , respectively to obtain the baseline...

AI Technical Summary

Problems solved by technology

Obviously, there are many problems such as heavy test workload, long test time, low test efficiency, and insufficient test accuracy when adopting this fully manual test method.

When using the traditional manual method for testing, due to the lack of a strict north pointing method, the north can only be roughly judged manually, it is difficult to achieve accurate north pointing, and the direction can only be roughly estimated; secondly, rotate to 90 degrees, 180 degrees, and 270 degrees in sequence according to the regulations , the manual method can’t realize the rotation of the angle accurately, it depends entirely on the subjective feeling and experience of the tester

In the traditional manual measurement, the test of each antenna or terminal needs to be turned on and off four times, and the angle is adjusted four times. Seven terminals need to be operated 56 times in total, which is time-consuming and laborious.

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