High-speed and high-precision desktop type small near-field tester

Abstract

The invention belongs to the technical field of antenna testing. The invention particularly relates to a high-speed and high-precision desktop type small near-field tester which comprises an optical platform, a two-dimensional cross scanning mechanism, a test probe, a control box, a two-dimensional high-precision adjusting turntable, an antenna mounting bracket, a parallelism detector, a control terminal and a terminal adjusting mechanism, the two-dimensional high-precision turntable and a two-dimensional cross mechanism are arranged on the optical platform in parallel front and back at intervals; the antenna mounting bracket is arranged at a rear part of the two-dimensional high-precision adjusting turntable; the test probe and the antenna mounting bracket are oppositely arranged; the test probe can move up and down and left and right for scanning through the two-dimensional cross scanning mechanism; the control terminal is movably connected with the optical platform through the terminal adjusting mechanism, the control terminal is connected with the control box through a circuit or a wireless signal, the control box is connected with a driving element of the two-dimensional crossscanning mechanism through a circuit or a wireless signal, the whole tester system is integrated on the optical platform, and the high-precision and high-speed testing, high repeated positioning precision and low noise are achieved.

Description

technical field [0001] The invention relates to the technical field of antenna testing, in particular to a high-speed and high-precision desktop small near-field tester. Background technique [0002] With the rapid development of aerospace technology, the performance requirements for airborne, missile-borne, and space-borne antennas are getting higher and higher. The measurement of antenna characteristic parameters is an important part of antenna design. There are many methods for antenna characteristic parameter measurement. At present, the main The methods include three categories: antenna far-field measurement, antenna compact field measurement, and antenna near-field measurement. Among them, antenna near-field measurement is mainly divided into: planar near-field, cylindrical near-field and spherical near-field. [0003] There are many error sources that affect the measurement accuracy of the antenna plane near-field, but the most influential error term comes from the ac...

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Problems solved by technology

[0004] At present, the transmission form adopted by domestic and foreign near-field testers is mostly the traditional "rotary motor + ball screw or rack and pinion" form. This form requires intermediate transmission links such as reducers and couplings, and there is a backlash , high noise, complex structure and other shortcomings, and the precision of transmission components is difficult to improve due to the influence of manufacturing costs, making the system unable to meet the needs of high precision and high speed

[0005] In addition, small near-field testers at home and abroad are mainly based on an inverted "T" structure, and the near-field tester and the antenna under test are mostly installed independently. The parallelism between the near-field tester and the antenna under test is important. The adjustment index, but limited by the measurement and adjustment equipment, the debugging is complicated, and the accuracy is more difficult to guarantee

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