The QDDCC-11900-18000 from Qualwave is a Waveguide Coupler with Frequency 11.9 to 18 GHz, Coupling 30 to 50 dB, Directivity 15 to 20 dB, Insertion Loss 0.1 dB, Power 180000 W. Tags: Dual Directional Coupler, Crossguide Coupler. More details for QDDCC-11900-18000 can be seen below.