Method of moments analysis of waveguide slot antennas using the EFIE

Abstract

Slotted waveguide array is analyzed using the Galerkin's method of moments (MoM) with the electric field integral equation (EFIE) applied to the metallic surfaces of the waveguide structure. The approach differs from existing methods that utilizes asymptotic method, MoM with the magnetic field integral equation (MFIE), or hybrid methods of MoM and boundary element method. Since no ideal assumptions are made, the analysis and computation are considered to be theoretically and numerically rigorous. The method is verified for its accuracy and applicability through comparisons of its numerical results with existing data. New results for arrays with narrow-wall slots cut at various angles of inclination are obtained and discussed.