Finite element method analysis of discontinuities of multi-dielectric rodsembedded in a parallel-plate waveguide

We have analysed various discontinuities inside a parallel-plate waveguide embedded with multi-dielectric rods by using an eight-node, isoparametric f inite element method (FEM). The proposed FEM technique is very efficient an d requires only small amounts of computer memory and computation time. In o rder to investigate the reflection and transmission properties of the struc tures, we have constructed diverse discontinuity configurations by choosing one, two or four dielectric rods inside a parallel-plate waveguide. The re search results indicate that both the reflection and transmission coefficie nts of the structures are highly dependent on the geometrical dimensions, n amely the height of the dielectric rods, the slot size of the slotted rods, as well as the total number of the dielectric rods.