The QDDBC-7500-18000 from Qualwave is a Waveguide Coupler with Frequency 7.5 to 18 GHz, Coupling 50 dB, Directivity 20 dB, Insertion Loss 0.3 dB, Power 2000 W. Tags: Double Ridged Coupler, Dual Directional Coupler, Broadwall Coupler. More details for QDDBC-7500-18000 can be seen below.