The QHK-2-20G SQ from Crane Aerospace & Electronics is a 90 Degree Hybrid Coupler with Frequency 19.7 to 20.2 GHz, Average Power 5 W, Insertion Loss 0.7 dB, Isolation 18 dB, Coupling -3 dB. Tags: Module with Connectors. More details for QHK-2-20G SQ can be seen below.