The QSDLC-2600-3950 from Qualwave is a Waveguide Coupler with Frequency 2.6 to 3.95 GHz, Coupling 30 dB, Directivity 25 dB, Insertion Loss 0.15 dB, Power 3500000 W. Tags: Directional Coupler, Loop Coupler. More details for QSDLC-2600-3950 can be seen below.