Modeling and study of high frequency relay based on equivalent circuit method

The equivalent circuit of signal path of high frequency relay was built by extracting the parasitic capacitance, inductance and resistance of signal path, based on the classical transmission line theory and partial element equivalent circuit (PEEC) method. The radio frequency (RF) performance curves of relay were obtained through simulation, and analysis of the equivalent circuit and the main factors which influence the insertion loss, voltage stand wave ratio (VSWR) and isolation of relay were discussed. The simulation results obtained by equivalent circuit method agree well with the experimental results, which show validity of the equivalent circuit model.