The DBDC2001000400C from Qotana is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 19 to 21 dB, Frequency Sensitivity ±0.4 to 0.5 dB, Directivity 23 to 25 dB, Average Power 50 W. Tags: Module with Connectors. More details for DBDC2001000400C can be seen below.