Electric and magnetic shielding efficiency measuring system and method
An electromagnetic shielding and measuring system technology, applied in the measurement of electrical variables, measuring electricity, measuring devices, etc., can solve the problem of not being able to measure the shielding effectiveness of the electric field and the shielding effectiveness of the magnetic field at the same time
Active Publication Date: 2019-06-14
CHINA ELECTRONICS PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST
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[0004] Based on this, it is necessary to provide a near-field shielding effectiveness measurement system for the above-mentioned technical problems that the electric field shielding effectiveness and magnetic field shielding effectiveness cannot be measured at the same time.
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[0036] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.
[0037] Such as figure 1 As shown, the embodiment of the present invention provides an electromagnetic shielding effectiveness measurement system, including an electromagnetic wave analysis device 1 , an electromagnetic wave emitting device 3 and a transverse electromagnetic wave chamber 2 .
[0038] Among them, the electromagnetic wave analysis device 1 is any device that can analyze electromagnetic waves. The electromagnetic wave analysis device 1 can output an electromagnetic wave control signal through the signal output terminal, and control the electromagnetic wave emitting d...
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The invention relates to an electric and magnetic shielding efficiency measuring system and method. The measuring system comprises electric and magnetic wave analysis equipment, an electric and magnetic wave emission device, and a Transverse Electric and Magnetic (TEM) cell, wherein the electric and magnetic wave emission device is arranged in an input window of the TEM cell, and is used to transmit TEM waves to the TEM cell; a first input end of the electric and magnetic wave analysis equipment is connected with a first output end of the TEM cell; a second input end of the electric and magnetic wave analysis equipment is connected with a second output end of the TEM cell; and the electric and magnetic wave analysis equipment is used to determine a first coupled transmission coefficient and a second coupled transmission coefficient between the electric and magnetic wave emission device and the TEM cell respectively according to signals output by the first output end of the TEM cell andsignals output by the second output end of the TEM cell before a shielding material to be tested is arranged, and to determine a third coupled transmission coefficient and a fourth coupled transmission coefficient between the electric and magnetic wave emission device and the TEM cell respectively according to signals output by the first output end of the TEM cell and signals output by the secondoutput end of the TEM cell after the shielding material to be tested is arranged.
Description
technical field [0001] The invention relates to the field of electromagnetic compatibility testing, in particular to an electromagnetic shielding effectiveness measurement system and a measurement method. Background technique [0002] Electromagnetic shielding refers to the use of the reflection, absorption or attenuation characteristics of the shielding body to prevent the electromagnetic energy flow generated by the electromagnetic radiation field source from entering the shielded area, thereby inhibiting the propagation of electromagnetic interference along the space. Electromagnetic shielding is one of the important means to solve the problem of electromagnetic compatibility. Among them, the electromagnetic shielding effectiveness is one of the important indicators to evaluate the electromagnetic shielding effect. The electromagnetic shielding effectiveness is the difference between the electromagnetic field strength and the shielding body at the same point in the electro...
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IPC IPC(8): G01R29/08G01R31/00
Inventor 王磊方文啸邵伟恒贺致远尧彬恩云飞黄云王铁羊骆成阳刘恒洲
Owner CHINA ELECTRONICS PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST