A Universal Multifunctional and Adjustable Spaceborne Antenna Test Platform

Abstract

The invention discloses a general-purpose multifunctional adjustable space-borne antenna test platform, which relates to the technical field of antenna test devices, and specifically includes a chassis frame, a rotating platform, a support frame and a working platform, and the upper surfaces of the chassis frames are respectively provided with bearings Seat, universal ball and auxiliary support feet, the surface of the bearing seat is provided with a slewing support, and the top of the slewing support is fixedly connected with the bottom of the rotating platform. Through the installation of universal wheels, worm gear lifts and adjustment devices, it is compatible with various caliber antenna array darkroom tests, effectively reducing design and production costs. It can fine-tune the pitch and azimuth angle of the antenna array, greatly improving The effect of the leveling efficiency of the darkroom antenna is solved, and the parameters such as the flatness of the antenna and the parallelism between the antenna array and the scanning frame in the darkroom have a great influence on the direction of the antenna array. The test platform needs to have the guarantee of the flatness of the array. And azimuth, pitch angle adjustment function.

Description

Technical field [0001] The present invention relates to an antenna test apparatus, specifically a general purpose multifunctional tunable spaceborne antenna test platform. Background [0002] In recent years, with the increase in the power of the spaceborne synthetic aperture radar, the antenna array aperture of the spaceborne active phased array antenna is increasing day by day, and the distance along the unfolding direction (azimuth direction) can reach more than 10 meters, usually after entering the orbit, the expandable mechanism is used to expand and support each antenna sub-board to achieve a larger physical aperture. In order to test the isoelectric properties of the antenna facet pattern before installing the star, the antenna test platform is often used to replace the spreadable mechanism to fix the support of the antenna daughter board, and simulate the antenna face state in the unfolded state in order to conduct the darkroom test of the phased array antenna. [0003] ...

AI Technical Summary

Problems solved by technology

The traditional antenna test platform often uses universal wheels to move back and forth to adjust the azimuth angle. At the same time, in order to ensure the rigidity of the large-diameter antenna test platform, the weight of the test platform is relatively large. When adjusting small angles, using universal wheels to adjust is not only cumbersome but may also cause angle Inaccurate and repeated operations, the erection and leveling time is often more than 2 days, which consumes a lot of manpower. Therefore, it is urgent to design a convenient and sensitive test platform with adjustable azimuth and pitch angles.

[0004] Different application requirements and different antenna working frequency bands lead to different calibers for each antenna array in the space. As a ground auxiliary test device, if a test platform is designed for each antenna array, it will It causes a lot of manpower, cost and cycle waste. Therefore, it is necessary to consider the versatility of the antenna test platform and make compatibility with the antenna array test requirements of different calibers.

[0005] At present, most domestic space-borne phased array antennas use heat pipes as a means of uniform temperature and heat conduction. When the ground antenna array is tested in a dark room, the heat pipe is perpendicular to the ground, and the heat pipe cannot be activated due to gravity, and the array temperature control system cannot work. The temperature rises sharply, which affects the reliability of the antenna phase and stand-alone components. Therefore, the antenna test stand needs to consider the function of auxiliary array heat dissipation during testing.

[0006] At present, there are few documents about this kind of space-borne test platform. The disadvantage of the existing space-borne antenna test platform is that the antenna pointing cannot be fine-tuned, and the test environment has not been fully evaluated, so the test requirements cannot be fully covered. , and are only designed for a single caliber antenna, resulting in a waste of manpower and cost. Therefore, a general-purpose, multi-functional, and adjustable space-borne test platform is proposed to improve the efficiency and accuracy of azimuth adjustment. , reduce costs, and ensure the effectiveness of electrical testing is very meaningful

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