The WR3.4x3 from Virginia Diodes, Inc. is a Frequency Multiplier with Input Frequency 73.3 to 110 GHz, Output Frequency 220 to 330 GHz, Input Power 5 to 150 mW, (21.76 dBm), Harmonics -20 dBc, Frequnecy 73.3 to 110 GHz. Tags: Waveguide, Waveguide Multiplier. More details for WR3.4x3 can be seen below.