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Shielding effectiveness analysis of an infinite cylindrical structure with a lateral aperture by modal method of moments

Shielding effectiveness analysis of an infinite cylindrical structure with a lateral aperture by modal method of moments

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In this study, an efficient and exact numerical technique based on modal method of moments (MoM) is presented to evaluate shielding effectiveness of an infinite cylindrical enclosure with a lateral aperture on its wall. To this end, modal vector wave functions are used to represent the electric field and consequently the surface magnetic current on the aperture. To calculate inside and outside magnetic fields, the circular waveguide dyadic Green's functions are utilised. The unknown magnetic current on the aperture is calculated using the MoM by enforcing the continuity of tangential magnetic field on the aperture. This method is employed for different enclosure sizes when illuminated by transverse magnetic (TM) polarised wave at two different incident angles.

References

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      • 1. Shen, Z.: ‘Shielding effectiveness of cylindrical enclosures with annular ring apertures’. 17th Int. Zurich Symp. on Electromagnetic Compatibility, 2006, pp. 3841.
    2. 2)
      • 2. Zheng, B., Shen, Z.: ‘Shielding effectiveness of cylindrical enclosures with rectangular apertures’. 19th Int. Zurich Symp. on Electromagnetic Compatibility, Singapore, 19–22 May 2008, pp. 710713.
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      • 6. Tai, C.T.: ‘Dyadic green function in electromagnetic theory’ (IEEE Press, New York, 1994, 2nd edn.).
    7. 7)
      • 7. Balanis, C.A.: ‘Advanced engineering electromagnetics’ (John Wiley & Sons, New York, 1989).
    8. 8)
      • 8. Harrington, R.F.: ‘Field computation by moment method’ (IEEE Press, New York, 1993, 1st edn.).
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-smt.2013.0170
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