The QC-5D3G6G from PMI RF is a quadrature coupler that operates from 5.3 to 6GHz.It provides a low insertion loss of 1 dB and an isolation of over 18 dB. It has aVSWR of1.4:1 and is matched to50 ohms. The coupler has an amplitude balance of+/-0.7dB and aphase balance is +/-5 degrees. It is available in a module with SMA male connectors that measures1.25in x 0.75in x 0.33in.