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Based on the Bethe's theory for small aperture coupling and the eigen-mode expansion method, an approximate analytic model for the field distribution inside a rectangular cavity with apertures under plane wave illumination is presented. The effects of aperture shape, dimensions, number, position, and the wave incidence and polarization angles on cavity mode excitation can be taken into consideration in this model with clear physical explanation. The calculation results from this model are in better agreement with experimental data than those from the equivalent circuit model. The effects of various factors on the shielding effectiveness of the cavity are analyzed, and the obtained results are useful for guiding the design of electromagnetic shielding enclosures.
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Keywords:
- aperture coupling /
- rectangular cavity /
- electromagnetic shielding /
- Bethe's theory
[1] Zhang K Q, Li D J 2001 Electromagnetic Theory for Microwave and Optoelectronics (2nd Ed) (Beijing: Electronic Industry Press) p250 (in Chinese) [张克潜, 李德杰 2001 微波与光电子学中的电磁理论(第二版) (北京: 电子工业出版社) 第250页]
[2] Fang J Y, Huang H J, Zhang Z Q, Huang W H, Jiang W H 2011 Acta Phys. Sin. 60 048404 (in Chinese) [方进勇, 黄惠军, 张治强, 黄文华, 江伟华 2011 60 048404]
[3] Wu Y, Jin X, Ma Q S, Li Z H, Ju B Q, Su C, Xu Z, Tang C X 2011 Acta Phys. Sin. 60 084101 (in Chinese) [吴洋, 金晓, 马乔生, 李正红, 鞠炳全, 苏昶, 许州, 唐传祥 2011 60 084101]
[4] Sirigiri J R, Kreischer K E, Machuzak J, Mastovsky I, Shapiro M A, Temkin R J 2001 Phys. Rev. Lett. 86 5628
[5] Song K H 2009 Chin. Phys. Lett. 26 120302
[6] Chen J, Wang J G 2007 IEEE Trans. Electromagn. Compat. 49 354
[7] Audone B, Balma M 1989 IEEE Trans. Electromagn. Compat. 31 102
[8] Wallyn W, Zutter D D, Rogier H 2002 IEEE Trans. Electromagn. Compat. 44 130
[9] Robinson M P, Benson T M, Christopoulos C, Dawson J F, Ganley M D, Marvin A C, Porter S J, Thomas D W P 1998 IEEE Trans. Electromagn. Compat. 40 240
[10] Dehkhoda P, Tavakoli A, Moini R 2008 IEEE Trans. Electromagn. Compat. 50 208
[11] Azaro R, Caorsi S, Donelli M 2001 Microwave and Optical Tech. Lett. 28 289
[12] Bethe H A 1944 Phys. Rev. 66 163
[13] Collin R E 1990 Field Theory of Guided Waves (2nd Ed) (New York: Wiley-IEEE Press) p507
[14] Mendez H A 1978 IEEE Trans. Electromagn. Compat. 20 296
[15] Frederick M T, Michel V I, Torbjorn K 1996 EMC Analysis Methods and Computational Models (New York: Wiley-Interscience Press) p210
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[1] Zhang K Q, Li D J 2001 Electromagnetic Theory for Microwave and Optoelectronics (2nd Ed) (Beijing: Electronic Industry Press) p250 (in Chinese) [张克潜, 李德杰 2001 微波与光电子学中的电磁理论(第二版) (北京: 电子工业出版社) 第250页]
[2] Fang J Y, Huang H J, Zhang Z Q, Huang W H, Jiang W H 2011 Acta Phys. Sin. 60 048404 (in Chinese) [方进勇, 黄惠军, 张治强, 黄文华, 江伟华 2011 60 048404]
[3] Wu Y, Jin X, Ma Q S, Li Z H, Ju B Q, Su C, Xu Z, Tang C X 2011 Acta Phys. Sin. 60 084101 (in Chinese) [吴洋, 金晓, 马乔生, 李正红, 鞠炳全, 苏昶, 许州, 唐传祥 2011 60 084101]
[4] Sirigiri J R, Kreischer K E, Machuzak J, Mastovsky I, Shapiro M A, Temkin R J 2001 Phys. Rev. Lett. 86 5628
[5] Song K H 2009 Chin. Phys. Lett. 26 120302
[6] Chen J, Wang J G 2007 IEEE Trans. Electromagn. Compat. 49 354
[7] Audone B, Balma M 1989 IEEE Trans. Electromagn. Compat. 31 102
[8] Wallyn W, Zutter D D, Rogier H 2002 IEEE Trans. Electromagn. Compat. 44 130
[9] Robinson M P, Benson T M, Christopoulos C, Dawson J F, Ganley M D, Marvin A C, Porter S J, Thomas D W P 1998 IEEE Trans. Electromagn. Compat. 40 240
[10] Dehkhoda P, Tavakoli A, Moini R 2008 IEEE Trans. Electromagn. Compat. 50 208
[11] Azaro R, Caorsi S, Donelli M 2001 Microwave and Optical Tech. Lett. 28 289
[12] Bethe H A 1944 Phys. Rev. 66 163
[13] Collin R E 1990 Field Theory of Guided Waves (2nd Ed) (New York: Wiley-IEEE Press) p507
[14] Mendez H A 1978 IEEE Trans. Electromagn. Compat. 20 296
[15] Frederick M T, Michel V I, Torbjorn K 1996 EMC Analysis Methods and Computational Models (New York: Wiley-Interscience Press) p210
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