The RCPL-0.5-6.0-10-20d-Sf-20W-3kW-Peak-w18 from Raditek is a Directional Coupler with Frequency 0.5 to 6 GHz, Coupling 10 to 20 dB, Coupling Variation ±1.2 dB, Frequency Sensitivity ±0.60 to ±1.20 dB, Directivity 16 to 22 dB. Tags: Module with Connectors. More details for RCPL-0.5-6.0-10-20d-Sf-20W-3kW-Peak-w18 can be seen below.