The QSDC-26000-40000-K1-30-28K from Qualwave is a Waveguide Coupler with Frequency 26 to 40 GHz, Coupling 30 dB, Directivity 25 dB, Insertion Loss 0.3 dB, Power 100 W. Tags: Directional Coupler. More details for QSDC-26000-40000-K1-30-28K can be seen below.