The PDM-81-3.8G SQ from Crane Aerospace & Electronics is a Power Divider with Frequency 3.3 to 4.3 GHz, Insertion Loss 0.7 dB, Isolation 20 dB, Input Power 2 W, Amplitude Balance ±0.4 dB. Tags: Module with Connectors, Wilkinson Power Divider. More details for PDM-81-3.8G SQ can be seen below.