The WMC-0.5-20-10dB-S from Werbel Microwave is a Directional Coupler with Frequency 0.5 to 20 GHz, Coupling 10 dB, Coupling Variation ±1.2 dB, Frequency Sensitivity ±0.54 to ±1.8 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for WMC-0.5-20-10dB-S can be seen below.