The CMX35C30 from Cemax/RN2 Technologies is a directional coupler that operates from 3.3 to 3.8 GHz. This 30 dB coupler can handle up to 20 Watts of power with a directivity of 18 dB, Insertion loss of 0.3 dB and VSWR of below 1.43:1. It is available in a compact surface mount package.