The PDM-21-1.51G SQ from Crane Aerospace & Electronics is a Power Divider with Frequency 1.418 to 1.605 GHz, Insertion Loss 0.25 dB, Isolation 23 dB, Input Power 1 W, Amplitude Balance ±0.1 dB. Tags: Module with Connectors. More details for PDM-21-1.51G SQ can be seen below.