The QDDC-1000-18000-30 from Qualwave is a Dual Directional Coupler with Coupling 10 to 30 dB, Coupling Variation ±0.7 dB, Frequency 1000 to 18000 MHz, Average Power 30 W, Insertion Loss 0.9 to 2.7 dB. Tags: Module with Connectors. More details for QDDC-1000-18000-30 can be seen below.