The RFDDC2G4G30 from RF-Lambda is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 1 to 30 dB, Coupling Variation `, Frequency Sensitivity ±0.7 dB, Directivity 18 dB. Tags: Module with Connectors. More details for RFDDC2G4G30 can be seen below.