DESIGN AND SIMULATION OF BRANCH LINE COUPLER FOR MIXER APPLICATION

A single section branch line coupler is proposed for performing Mixer operation in wireless communication and Radar applications. The branch line coupler is a type of qudrature hybrid coupler. In this work, it is designed on a 1.6 mm thick FR4 substrate at 1 GHz frequency and the simulation is carried-out in schematic and layout levels using Advanced Design System software. The scattering parameters are analyzed in the frequency range 0.5 GHz to 1.5 GHz for the excitation of four ports and the scattering matrix is obtained at 1 GHz designed frequency. The coupling factor, isolation and directivity are calculated from the scattering parameters.