The QHK-2-20.7G SQ from Crane Aerospace & Electronics is a 90 Degree Hybrid Coupler with Frequency 20.2 to 21.2 GHz, Average Power 5 W, Insertion Loss 1 dB, Isolation 20 dB, Coupling -3 dB. Tags: Module with Connectors. More details for QHK-2-20.7G SQ can be seen below.