The WR3.4SHM from Virginia Diodes, Inc. is a Waveguide Mixer with RF Frequency 220 to 330 GHz, LO Frequency 110 to 165 GHz, IF Frequency 40 GHz, Conversion Loss 8.5 dB, LO Drive Level 3 to 6 dBm. Tags: Sub-Harmonic Mixer. More details for WR3.4SHM can be seen below.