The MQS-0418UA from Marki Microwave is a 90 Degree Hybrid Coupler with Frequency 4 to 18 GHz, Insertion Loss 1.9 to 3.8 dB, Isolation 10 to 20 dB, Coupling 3 dB, Amplitude Balance ±0.4 to ±2 dB. Tags: Module with Connectors. More details for MQS-0418UA can be seen below.