LF Scattering of a Cylindrical Shield in an Alternating Magnetic Field

Abstract

Electromagnetic shields are commonly applied to reduce electromagnetic emission from electronic circuits. In many applications, also the scattering of incident magnetic fields has to remain sufficiently low. Commonly-applied approximate formulas in literature give erroneous results for scattering at low frequencies. In this paper, an improved solution of the diffusion equation is presented that accurately describes scattering of a cylindrical shield in a transversal alternating magnetic field down to low frequencies.