Design of complex ratio measuring unit (CRMU) for 2 to 6 GHz WiMAX applications

A Complex Ratio Measuring Unit (CRMU) for 2 to 6 GHz WiMAX applications is presented in this article. CRMU is formed by three 3-dB quadrature couplers and one inphase power divider, which are placed symmetrically. The configuration and performance of each coupler, power divider and CRMU are presented. The coupler, power divider and CRMU are designed using CST Microwave Studio while the S-parameter analysis is using Advanced Design System Software (ADS).