The JDMH2228S from DFINE Technology is a 180 Degree Hybrid Coupler with Frequency 2.2 to 2.8 GHz, Coupling 3 dB, Amplitude Balance ±0.35 dB, Phase Balance ±5 Degree, Insertion Loss 0.35 dB. Tags: Module with Connector. More details for JDMH2228S can be seen below.