The IPP-3151 from Innovative Power Products is a dual directional coupler that operates from 2 MHz to 30 MHz. It has an insertion loss of less than 0.15 dB, directivity of over 22 dB and a VSWR of 1.25:1. The coupler can handle up to 2500 W of average power and has a nominal coupling of 50 +/- 1.5 dB. It is available in a module that measures 2 x 4 inches and has SMA/N female connectors.