Accurate Analysis of Dielectric Backed Planar Conducting Layers of Arbitrarily Shaped in a Rectangular Waveguide

The characteristics of dielectric backed planar conducting layers of arbitrarily shaped in a rectangular waveguide are calculated by means of coupled integral equation technique (ciet) which accurately takes higher order mode interactions. spectral dyadic green’s functions are derived for these equivalent structures. a coupled magnetic filed integral equation formulation is proposed which is solved using method of moment (mom). then one matrix equation that involves the all magnetic currents of non metallic parts (aperture parts) of discontinuities is derived. this single matrix formulation replaces the procedure of cascading individual gsm’s of each block. by dividing the area of cross section in discontinuities into a given number of subsections, it is possible to model any shape of metallic parts. the proposed technique permits modeling of a variety of structures such as cavity-backed micro strip antenna, frequency selective surfaces (fss’s), waveguide filters with printed irises and generally multilayered media with printed circuits embedded between dielectric layers in a waveguide. the usefulness of the proposed method and its performance are verified by calculating and simulating of a given structure.