The MQS-0418CH from Marki Microwave is a 90 Degree Hybrid Coupler with Frequency 4 to 18 GHz, Insertion Loss 1.5 to 3.2 dB, Isolation 11 to 16 dB, Coupling 3 dB, Amplitude Balance ±0.4 to ±2 dB. Tags: Surface Mount. More details for MQS-0418CH can be seen below.