The RCPL-0.5-8.0-20d-Sf-100W Avg-3kW Pk-w18 from Raditek is a Directional Coupler with Frequency 0.5 to 8 GHz, Coupling 20 to 30 dB, Coupling Variation ±1 to ±1.5 dB, Frequency Sensitivity ±1 dB, Amplitude Flatness ±1 dB. Tags: Module with Connectors. More details for RCPL-0.5-8.0-20d-Sf-100W Avg-3kW Pk-w18 can be seen below.