The QHM-4R-11G SQ from Crane Aerospace & Electronics is a 90 Degree Hybrid Coupler with Frequency 4.2 to 18 GHz, Average Power 2 W, Insertion Loss 1.6 dB, Isolation 15 dB, Coupling -3 dB. Tags: Module with Connectors. More details for QHM-4R-11G SQ can be seen below.