Shielding effectiveness analysis of rectangular cavity with aperture by modification and expansion of transmission line method

Peng Qiang; Zhou Dongfang; Hou Deting; Yu Daojie; Hu Tao; Wang Liping; Xia Wei

doi:10.3788/HPLPB20132509.2355

Volume 25 Issue 09

Jul. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(09): 2355-2362

Zeng Shuguang, Zhang Bin, Sun Nianchun, et al. Chirp-matching OPCPA scheme for eliminating pre-pulse of ultrashort laser pulse[J]. High Power Laser and Particle Beams, 2012, 24: 394-398. doi: 10.3788/HPLPB20122402.0394

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Peng Qiang, Zhou Dongfang, Hou Deting, et al. Shielding effectiveness analysis of rectangular cavity with aperture by modification and expansion of transmission line method[J]. High Power Laser and Particle Beams, 2013, 25: 2355-2362. doi: 10.3788/HPLPB20132509.2355

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Shielding effectiveness analysis of rectangular cavity with aperture by modification and expansion of transmission line method

doi: 10.3788/HPLPB20132509.2355

1.
Information Engineering University of People’s Liberation Army,Zhengzhou 450002,China

Received Date: 2012-12-12
Rev Recd Date: 2013-04-25
Publish Date: 2013-07-17

Abstract

Abstract

In order to study the influences of the incident electromagnetic wave and seam parameter on the rectangular cavity of shielding effectiveness (SE), SE analysis of cavity based on the transmission law combined with equivalent transmission line method was performed. The transmission into cavity of electric field was derived in detail, we took the transmission electric field as equivalent voltage source and revised the traditional transmission line model, and the calculation formula of this method was extended, it could analyze different shapes, hole array, hole spacing and loss, etc. Research shows that hole located in the center of the body wall of SE was worse than that near the body wall edge area. Compared with incident angle and azimuth angle, polarization angle has greater impact on the cavity SE. When keeping hole array area unchanged, decreasing aperture diameter, which increases the number of holes and hole spacing, can improve the cavity SE. Greater loss factor of cavity can induce better resonant frequency suppression effect. By analysis of cavity resonance frequency with theoretical and numerical methods, the result obtained by modification and expansion of the analysis method is credible.
- shielding efficiency,
- transmission law,
- off center,
- loss factor,
- resonance frequency

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