The BC-N000-20S from UMCC is a Bi-Directional Coupler that operates from 6 to 18 GHz. It has a coupling value of 20 dB, an insertion loss of less than 1.1 dB, directivity of over 10 dB and a VSWR of 1.55:1. The coupler can handle up to 50 W. It is available in a module with SMA female connectors.