The QDDBC-5800-16000 from Qualwave is a Waveguide Coupler with Frequency 5.8 to 16 GHz, Coupling 50 dB, Directivity 25 dB, Power 2000 W. Tags: Double Ridged Coupler, Dual Directional Coupler, Broadwall Coupler. More details for QDDBC-5800-16000 can be seen below.