The QH-43 from Cobham Signal & Control Solutions is a 90 Degree Hybrid Coupler with Frequency 2.6 to 5.2 GHz, Insertion Loss 0.2 dB, Isolation 20 dB, Coupling 3 dB, Coupling Variation ±.45 dB. Tags: Module with Connectors. More details for QH-43 can be seen below.