The CP20020A-20 from Amtery is a Bi-Directional Coupler that operates from 0.5 to 20 GHz. This coupler has a coupling value of 20 dB, directivity of over 15 dB, insertion loss of under 1.7 dB and can handle up to 20 watts of average power. It is available in a module with SMA Female connectors.