The JDMH2040R from DFINE Technology is a 90 Degree Hybrid Coupler with Frequency 2 to 4 GHz, Insertion Loss 0.6 dB, Isolation 20 dB, Coupling 3 dB, Amplitude Balance ± 0.5 Degree. Tags: Module with Connectors. More details for JDMH2040R can be seen below.