The QDDBC-5000-18000 from Qualwave is a Waveguide Coupler with Frequency 5 to 18 GHz, Coupling 40 dB, Directivity 25 dB, Power 2000 W. Tags: Double Ridged Coupler, Dual Directional Coupler, Broadwall Coupler. More details for QDDBC-5000-18000 can be seen below.