The WMDCXX-2-18-S-A3 from Werbel Microwave is a stripline directional coupler that operates from 2 to 18 GHz. This RoHS compliant coupler is available in coupling values of 10, 15, 20 and 30 dB with a flatness of 0.3 dB across the frequency band. It has a directionality of 17 dB and can handle up to 20 watts of power. The coupler is available in a module with field-replaceable SMA connectors relieve mechanical stress on solder joins.