The JDMH2040S from DFINE Technology is a 180 Degree Hybrid Coupler with Frequency 2 to 4 GHz, Coupling 3 dB, Amplitude Balance ±0.5 dB, Phase Balance ±6 Degree, Insertion Loss 0.6 dB. Tags: Module with Connector. More details for JDMH2040S can be seen below.