The QHK-2-20G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 19.7 to 20.2 GHz, Coupling 3 dB, Power 5 W, Amplitude Balance 0.6 dB, Phase Balance ±5 Degrees. Tags: Module with Connectors. More details for QHK-2-20G SQ can be seen below.