The PS4-21/NF from MCLI is a Power Divider with Frequency 1000 to 3000 MHz, Insertion Loss 1 dB, Isolation 17 dB, Input Power 30 W, Amplitude Balance 0.5 dB. Tags: Module with Connectors, Stripline Power Divider. More details for PS4-21/NF can be seen below.
