ELECTROMAGNETIC SCATTERING FROM A COAXIAL DIELECTRIC CIRCULAR-CYLINDER LOADING IN A SEMICIRCULAR GAP IN A GROUND PLANE

An exact dual series solution of a plane wave incident on a coaxial di electric circular cylinder imbedded in a semicircular gap of a ground plane is presented. Both TM and TE cases are considered here. The scat tered field is represented in terms of an infinite series of cylindric al waves with unknown coefficients. By applying the boundary condition s and employing the partial orthogonality of the trigonometric functio ns the scattering coefficients are obtained. The resulting infinite se ries is then truncated to a finite number of terms to produce numerica l results. For the sake of comparison with the published data some spe cial cases are introduced first. The comparisons showed excellent agre ement in all cases.