Empirical Formulas of SIRW and Its Application in Half-Mode SIRW Hybrid Ring Coupler Design

Abstract

Two brief empirical formulas of substrate integrated ridged waveguide(SIRW) are derived to calculate the equivalent parameters between SIRW and ridged waveguide. Using these formulas, a wideband hybrid ring coupler based on half-mode substrate integrated ridged waveguide(HMSIRW) is designed conveniently. The simulated and measured results show that the bandwidth increased by 7% compared to half-mode substrate integrated waveguide hybrid ring coupler.