The FDG-4A-1600 SQ from Crane Aerospace & Electronics is a Space Qualified Frequency Multiplier with Frequnecy 25 MHz to 3 GHz, Input Frequency 25 MHz to 3 GHz, Input Power 7 to 16 dBm, Harmonics -30 to -15 dBc, Conversion Loss 12 to 15.5 dB. Tags: Surface Mount, Passive. More details for FDG-4A-1600 SQ can be seen below.