The RCPL-1.0-3.5-20d-Sf-50W (3kW Peak)-z4 from Raditek is a Directional Coupler with Frequency 1 to 3.5 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 20 dB, Average Power 50 W. Tags: Module with Connectors. More details for RCPL-1.0-3.5-20d-Sf-50W (3kW Peak)-z4 can be seen below.