Input admittance and aperture field of flanged coaxial line radiating into layered half-space

Abstract

The problem of a semi-infinite coaxial line opening into a layered half-space with arbitrary number of layers is investigated. An integral equation for the radial component of the aperture electric field is formulated and solved numerically using the Galerkin method. Numerical computations were performed for two layer half-space in a numerical example taken from a biomedical engineering application in the irradiation of composite biological tissues with a radio frequency wave. Results for the input admittance as well as the aperture field distribution are presented and comparison with existing literature is made.