Input impedance modeling of patch and semi rectangular substrate integrated waveguide cavity hybrid antenna
Abstract A complete equivalent circuit model of input impedance is developed for a hybrid antenna, which consists of a Half Mode Substrate Integrated Waveguide (HMSIW) resonator and a microstrip patch. An accurate circuit model is derived using Transmission Line (TL) model and lumped element. The results based on the circuit modeling are presented and compared with those obtained using full wave simulation. The proposed model, for the first time, clarifies fundamental characteristics of the input impedance of the hybrid antenna, which are verified by the results of a full wave simulation and those obtained by measurement.