The QH-0550 from Marki Microwave is a 90 Degree Hybrid Coupler with Frequency 5 to 50 GHz, Insertion Loss 1 dB, Isolation 13 to 22 dB, Coupling 3 dB, Amplitude Balance ± 0.6 to ±1.2 dB. Tags: Module with Connectors. More details for QH-0550 can be seen below.