The C7753 from Werlatone is a 4-Port Bi-Directional Coupler that operates from 700 MHz to 4.2 GHz. It provides 20 dB of coupling with a directivity of more than 18 dB and has an insertion loss of less than 0.35 dB. The coupler can handle an average CW power of 100 W, a peak power of up to 1 kW, and has a VSWR of less than 1.25:1. It is available in a module that measures 1.8 x 1.0 x 0.59 inches with SMA I/O connectors and is designed for simultaneously monitoring both forward and reverse power.