The QY-18D00 from Clear Microwave, Inc is a 90 Degree Hybrid Coupler with Frequency 12 to 24 GHz, Average Power 50 W, Peak Power 3 kW, Insertion Loss 0.6 dB, Isolation 16 dB. Tags: Module with Connectors, Octave Band Coupler. More details for QY-18D00 can be seen below.