The WR2.8SHM from Virginia Diodes, Inc. is a Waveguide Mixer with RF Frequency 260 to 400 GHz, LO Frequency 130 to 200 GHz, IF Frequency 40 GHz, Conversion Loss 9 dB, LO Drive Level 3 to 6 dBm. Tags: Sub-Harmonic Mixer. More details for WR2.8SHM can be seen below.