The Series C-1185 Directional Couplers from Werbel Microwave operate from 500 MHz to 18.5 GHz. They are available in coupling values of 10, 15, 20 and 30 dB with a directivity of up to 20 dB and a VSWR of 1.4:1. The couplers can handle up to 20 watts of average power. They are available in a module with SMA connectors which are matched to 50 ohms.