The FDG-4B-500 SQ from Crane Aerospace & Electronics is a Space Qualified Frequency Multiplier with Input Frequency 5 to 500 MHz, Input Power 7 to 16 dBm, Harmonics -40 to -25 dBc, Conversion Loss 12 to 17 dB, VSWR 2.00:1. Tags: Surface Mount. More details for FDG-4B-500 SQ can be seen below.