The WR1.9SHM from Virginia Diodes, Inc. is a Waveguide Mixer with RF Frequency 400 to 600 GHz, LO Frequency 200 to 300 GHz, IF Frequency 40 GHz, Conversion Loss 10 dB, LO Drive Level 4 to 8 dBm. Tags: Sub-Harmonic Mixer. More details for WR1.9SHM can be seen below.