The DQ-DJ-2040-180 from A-Info is a 180 Degree Hybrid Coupler with Frequency 2 to 4 GHz, Amplitude Balance ±0.30 dB, Phase Balance ±5.0 dB, Insertion Loss 1 dB, Isolation 20 dB. Tags: Module with Connector. More details for DQ-DJ-2040-180 can be seen below.