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Showing papers by "Helsinki University of Technology published in 1968"


Journal ArticleDOI
TL;DR: In this article, a simple formula for the minimum attenuation of incoming plane waves in spherical shields is presented for practical purposes, where the medium inside and outside the shield is air and the material is supposed to be well conducting.
Abstract: In this communication, a simple formula for the minimum attenuation of incoming plane waves in spherical shields is presented for practical purposes. This worst case condition is attained when the TM 011 resonance occurs in the room. The medium inside and outside the shield is air and the material is supposed to be well conducting.

5 citations