The QY-3D90 from Clear Microwave, Inc is a 90 Degree Hybrid Coupler with Frequency 2.6 to 5.2 GHz, Average Power 50 W, Peak Power 3 kW, Insertion Loss 0.2 dB, Isolation 23 dB. Tags: Module with Connectors, Octave Band Coupler. More details for QY-3D90 can be seen below.