The QDDBC-17600-26700 from Qualwave is a Waveguide Coupler with Frequency 17.6 to 26.7 GHz, Coupling 10 to 50 dB, Directivity 20 to 30 dB, Insertion Loss 0.15 to 0.2 dB, Power 66000 W. Tags: Dual Directional Coupler, Broadwall Coupler. More details for QDDBC-17600-26700 can be seen below.