The DBDC1004001800C from Qotana is a Directional Coupler with Frequency 4 to 18 GHz, Coupling 9 to 11 dB, Frequency Sensitivity ±0.5 dB, Directivity 12 to 15 dB, Average Power 50 W. Tags: Module with Connectors. More details for DBDC1004001800C can be seen below.