Electromagnetic modeling of a waveguide-based strip-to-slot transition module for application to spatial power combining systems

A method of moments integral equation formulation is proposed for the full-wave analysis of an arbitrarily shaped waveguide-based strip-to-slot transition module for application to spatial power combining systems. A generalized scattering matrix (GSM) of the transition is obtained as an individual GSM in the cascading algorithm for a composite GSM of power combining systems. The proposed approach can be efficiently used in modeling electrically thin substrates rather than individual GSM cascading of individual electric and/or magnetic layers.