Electromagnetic Coupling by a Wire through a Circular Aperture in an Infinite Planar Screen

Abstract

The problem of electromagnetic penetration on a wire passing through an infinite screen is considered. An electric field integral equation is formulated, and solutions are obtained using both a zeroth order approximation and the method of moments. Numerical results for both the equivalent admittance and the current on the wire are obtained using both methods. The two solutions are then compared to verify the accuracy of the zeroth order approximation. It is found that the zeroth order approximation is valid for aperture radii less than 1/10 of a wavelength. It is also found that the electromagnetic coupling through the aperture is enhanced strongly by the presence of the wire.