The MQH-0517CH from Marki Microwave is a 90 Degree Hybrid Coupler with Frequency 5 to 17 GHz, Insertion Loss 1.3 to 4.5 dB, Isolation 14 to 23 dB, Coupling 3 dB, Amplitude Balance ±0.5 to ±2 dB. Tags: Surface Mount. More details for MQH-0517CH can be seen below.