The MQH-1842CH from Marki Microwave is a 90 Degree Hybrid Coupler with Frequency 18 to 42 GHz, Insertion Loss 1.5 to 3 dB, Isolation 7.5 to 15 dB, Coupling 3 dB, Amplitude Balance ±1.5 to ±2.5 dB. Tags: Die. More details for MQH-1842CH can be seen below.