Line stirrer design method for improving reverberation chamber field uniformity

A design method and technology of reverberation chamber, applied in electromagnetic field characteristics, instruments, measurement of interference from external sources, etc., can solve the problems of low accuracy of independent stirring position, large inertia, large weight, etc., and reduce the weight of mechanical stirrers. , the effect of reducing weight and uniform electromagnetic environment

Active Publication Date: 2020-06-26
UNIT 63892 OF PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is due to the low accuracy of the independent stirring position caused by the large weight and inertia of the traditional stirrer

Method used

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  • Line stirrer design method for improving reverberation chamber field uniformity
  • Line stirrer design method for improving reverberation chamber field uniformity
  • Line stirrer design method for improving reverberation chamber field uniformity

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Embodiment Construction

[0028] In order to better understand the technical solutions of the present invention, the following content will further describe the embodiments of the present invention in conjunction with the accompanying drawings.

[0029] Such as Image 6 As shown, a stirring design method to improve the uniformity of the reverberation room field, the steps are as follows:

[0030] The first step is to calculate the lowest usable frequency of the reverberation chamber. According to the size of the reverberation chamber cavity, first calculate the resonant frequency of the resonant cavity:

[0031]

[0032] The unit is MHz; where: l, w, h are the length, width, and height of the reverberation chamber; m, n, and p are 0 or integers respectively. Put the size of the reverberation chamber into equation (1) and calculate the resonance frequency of the chamber. The lowest usable frequency (LUF) of the reverberation room should be at least 3-4 times the resonant frequency of the resonant cavity to g...

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Abstract

The invention discloses a line stirrer design method for improving reverberation chamber field uniformity. The invention belongs to the technical field of electromagnetic compatibility testing. A method for evaluating electric field uniformity of a test area of a pulse excitation reverberation chamber comprises the following steps: acquiring S21 parameters at a plurality of vertexes of a test areaunder the position of a single stirrer through a proper amount of network analyzers, starting from a frequency domain, performing inverse Fourier transform to a time domain, intercepting a time domain signal in a time period through a time gate technology for processing, intercepting a section of signal of a source signal in the test area of a reverberation chamber through the time gate technology, and calculating an electric field intensity standard deviation and a total standard deviation in the time gate; and finally, comparing the obtained standard deviation in the orthogonal direction and the total standard deviation with specified values of the International Electrotechnical Commission. The measurement process is simple and convenient, the speed is high, and the test time is saved.The introduced error is small, and the obtained result is closer to the distribution characteristic of an electromagnetic field environment of the test area in the real reverberation chamber.

Description

Technical field [0001] The invention belongs to the field of electromagnetic compatibility testing, and particularly relates to a design method of a stirrer for improving the field uniformity of a reverberation chamber. Background technique [0002] The effect of complex electromagnetic environment is a current research hotspot and focus. The reverberation room can provide a statistically uniform, random polarization, and isotropic diffuse field electromagnetic environment of "omnidirectional irradiation". It occupies a very important position in the field of complex electromagnetic environment effect testing. Regardless of whether the reverberation chamber is grouped in step mode or continuous mode, its agitator is responsible for generating multiple boundary conditions during the test process and providing a sufficient number of independent mixing positions. The working performance of the agitator will directly affect the performance parameters of the reverberation chamber, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R29/08
CPCG01R31/001G01R29/0821G01R29/0871
Inventor 贾锐李新峰何洪涛郭浩耿利飞
Owner UNIT 63892 OF PLA
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