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IEEE Transactions on Antennas and Propagation
Volume 47 Number 8, August 1999

Radiation and Low-Frequency Scattering of EM Waves in a General Anisotropic Homogeneous Medium

Page 1364.

Abstract:

This paper focuses on a boundless homogeneous medium with general anisotropy of electromagnetic properties. The explicit exact form of the four spectral Green's dyads G(k) is obtained and a coordinate-free representation of the four spatial Green's functions G(x- x') in terms of one scalar potential W(x - x') is developed. On this basis, asymptotic expressions for the radiation field due to arbitrary sources are derived that show that the associated modes and the eigenmodes determine radiation along a singular optic axis and in all other directions, respectively. Using an integral equation approach and the theory of Newtonian potential, the problem of low-frequency scattering by a small anisotropic ellipsoidal body immersed into an anisotropic medium is solved analytically.

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