The FDR-3-6 from Shireen, Inc is a Frequency Multiplier with Input Frequency 1.5 to 2.5 GHz, Output Frequency 2.5 to 6 GHz, Input Power 10 to 20 dBm, Conversion Loss 14 to 22 dB, VSWR 1.70:1, 3.50:1. Tags: Module with Connectors, Passive, Frequency Doubler. More details for FDR-3-6 can be seen below.