Universal multifunctional adjustable satellite-borne antenna test platform

Abstract

The invention discloses a universal multifunctional adjustable satellite-borne antenna test platform, and relates to the technical field of antenna testing devices. The universal multifunctional adjustable satellite-borne antenna test platform specifically comprises a base disc frame, a rotating platform, a supporting frame and a working platform, wherein the upper surface of the base disc frame is provided with a bearing pedestal, universal balls and auxiliary supporting legs, the surface of the bearing pedestal is provided with a slewing bearing, and the top part of the slewing bearing is fixedly connected with the bottom part of the rotating platform. Through the arrangement of the universal wheels, a worm and gear lifter and an adjusting device, a darkroom test compatible with antennaarray planes with various apertures is achieved; the design and production cost is effectively reduced; the antenna array plane pitching and azimuth angle can be finely adjusted; the effect of darkroom antenna leveling efficiency is greatly improved, and the problems that parameters such as the antenna flatness and the parallelism between an antenna array plane and a darkroom scanning frame have large influences on the pointing direction of the antenna array plane and the test platform needs to have the functions of array plane flatness guarantee and azimuth and pitch angle adjustment are solved.

Description

technical field [0001] The invention relates to an antenna testing device, in particular to a general-purpose multifunctional adjustable satellite-borne antenna testing platform. Background technique [0002] In recent years, with the improvement of the power of space-borne synthetic aperture radar, the aperture of the space-borne active phased array antenna is increasing day by day, and the distance along the deployment direction (azimuth direction) can reach more than 10 meters. The expansion mechanism is used to expand and support each antenna sub-board to achieve a larger physical aperture. In order to test the electrical performance of the antenna array pattern before installing the satellite, the antenna test platform is often used instead of the expandable mechanism to fix the antenna sub-board to simulate the state of the antenna array in the unfolded state, so as to conduct phased array antenna darkroom test. [0003] Since parameters such as the flatness of the a...

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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