Finite Element Solution of Dielectric Loaded Waveguides

Despite the widespread use of dielectric Ioaded waveguides in microwave components, their basic electrical properties are, in general, theoretically unknown. Analytic solution is prohibited, except for a few simple geometries, by the difficulty of matching electric and magnetic fields at the air-dielectric interface; consequently, recent efforts to find a solution have employed numerical methods. In this paper, the finite element method will be applied in an unrestricted sense to inhomogeneous waveguides and some computed results wilI be presented.