The QHK-2-4.5G SQ from Crane Aerospace & Electronics is a 90 Degree Hybrid Coupler with Frequency 3 to 6 GHz, Average Power 10 W, Isolation 18 dB, Coupling 3.2 dB, Coupling Variation ± 0.7 dB. Tags: Module with Connectors. More details for QHK-2-4.5G SQ can be seen below.