Analysis of a Circularly-Polarized Circular- and Hexagonal-Slot Element on a Parallel-Plate Waveguide with Perpendicular Corporate-Feed

In this paper, the analysis method by hybrid the method of moments (MoM) and finite element method (FEM) is presented for a circularly-polarized circular- and hexagonal-slot element on a parallel-plate waveguide with perpendicular corporate feed. The method uses analytical and numerical entire domain basis functions depending on the slot shape. The analysis results are compared with commercial software and showed agreement.