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Quasi-optical cavity broadband automatic test system and test method

An automatic test system and automatic test technology, applied in the test field, can solve the problems of poor filtering effect, resonant frequency shift, and lower quality factor of the main mode.

Pending Publication Date: 2021-10-29
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

When testing in the broadband, the filter board and filter sleeve are designed according to the lowest frequency, and the filtering effect becomes worse after the frequency increases; the filter board and filter sleeve are designed according to the highest frequency, which will interfere with the main mode and reduce the main mode during the low frequency test. quality factor of the mode and cause a shift in resonant frequency

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  • Quasi-optical cavity broadband automatic test system and test method
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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0031] The present invention adopts the filter plate method to suppress the high-order mode. The size of the filter structure cannot be changed according to the frequency. Therefore, the filter plate filter method can be used to adjust the height according to the test frequency to realize the automatic test of the frequency adaptive broadband quasi-optical cavity method.

[0032] The invention designs to fix the filter plate on the motor that can be controlled to move up and down by programmable control, and determines the most suitable height of the filter plate by analyzing the distribution of the main mode field at different frequencies, establishes the corresponding relationship between frequency and height, and then uses the program to control the height of the filter plate The test frequency change is automatically adjusted, and the softwa...

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Abstract

The invention discloses a quasi-optical cavity broadband automatic test system and a test method, belongs to the technical field of test, and aims at the problem that a high-frequency mode is difficult to recognize. A programmable control motor is firstly designed to fix a filter plate and adjust the height of the filter plate; secondly, different frequency field distribution of a main mode are analyzed to determine an optimal filter plate position of a corresponding frequency band, the filter plate fixed position of the motor is controlled and adjusted according to the test frequency change to obtain the frequency and position relationship of the filter plate, and the problem that the purification effect of a broadband test mode is poor and is not beneficial to mode recognition due to the fixed filter plate is solved; and finally, broadband automatic test of the quasi-optical cavity system is realized through software integration.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a quasi-optical cavity broadband automatic testing system and testing method. Background technique [0002] At this stage, the dielectric properties of low-loss materials in the millimeter wave band are mainly tested by the quasi-optical cavity (quasi-optical cavity) method. The high-order resonant modes in the quasi-optical cavity increase greatly with the increase of frequency. The higher-order mode not only affects the resonance performance of the main mode (test mode) and reduces the quality factor of the main mode, but also the resonant mode close to the main mode will superimpose with the main mode and cause the distortion of the resonant peak. During the high-frequency test, the resonance superposition of many high-order modes with the same resonance frequency results in a higher resonance power than the test mode, which brings great difficulties to the mode r...

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Application Information

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IPC IPC(8): G01R27/26
CPCG01R27/2617G01R27/2682
Inventor 邹翘赵锐张升华王亚海年夫顺
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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