Articles | Volume 13
03 Nov 2015
 | 03 Nov 2015

Energy conserving coupling through small apertures in an infinite perfect conducting screen

J. Petzold, S. Tkachenko, and R. Vick

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Cited articles

Bethe, H.: Theory of Diffraction by Small Holes, Phys. Rev., 66, 163–182,, 1944.
Collin, R. E.: Small aperture coupling between dissimilar regions, Electromagnetics, 2, 1–24, 1982.
Nosich, A. I.: The method of analytical regularization in wave-scattering and eigenvalue problems: foundations and review of solutions, IEEE Antenn. Propag. M, 41, 34–49,, 1999.
Rambousky, R., Tkachenko, S., and Nitsch, J.: Calculation of currents induced in a long transmission line placed symmetrically inside a rectangular cavity, in: 2013 IEEE International Symposium on Electromagnetic Compatibility – EMC 2013, Denver, CO, USA, 5–9 August 2013, pp. 796–801,, 2013.
Tesche, F. M., Ianoz, M., and Karlsson, T.: EMC analysis methods and computational models, John Wiley & Sons, New York, USA, 1997.
Short summary
Apertures in shielding enclosures are an important issue for determining shielding efficiencies. Bethe’s theory describes the coupling via field excited dipole moments at the location of the aperture. This approach neglects the reaction of the dipoles on the exciting field and therefore violates energy conservation. This work emphasizes an analytical asymptotic approach for coupling between half-spaces through small apertures, which allows an understandable generalization of Bethe’s theory.