The WMC-0.5-18.5-10dB-S from Werbel Microwave is a Directional Coupler with Frequency 0.5 to 18.5 GHz, Coupling 10 dB, Coupling Variation ±1.0 dB, Frequency Sensitivity ±0.5 to ±1.5 dB, Directivity 12 to 16 dB. Tags: Module with Connectors. More details for WMC-0.5-18.5-10dB-S can be seen below.