Wideband Design of 2×2-element Post WallWaveguide Slot Subarray for 350-GHz band

This paper presents a wideband design of a 2×2-element post wall waveguide slot subarray for the 350-GHz band. The subarray is fed by a corporate feed circuit and is composed of a cavity and slots. The subarray is analyzed by a hybrid method of moments and finite element method and optimized by a genetic algorithm. The subarray shows 11% reflection bandwidth where reflection is below -14dB. In the future, we plan to analyze the overall structural model and evaluate the actual measurements.