The WR2.8x3 from Virginia Diodes, Inc. is a Frequency Multiplier with Input Frequency 86.7 to 133.3 GHz, Output Frequency 260 to 400 GHz, Input Power 5 to 120 mW, (20.8 dBm), Harmonics -20 dBc, Frequnecy 86.7 to 133.3 GHz. Tags: Waveguide, Waveguide Multiplier. More details for WR2.8x3 can be seen below.