The 312D from ACST GmbH is a Waveguide Mixer with RF Frequency 140 to 220 GHz, LO Frequency 70 to 110 GHz, IF Frequency DC to 40 GHz, Conversion Loss 7 to 10 dB, LO Drive Level 7 to 12 dBm. Tags: Down Converter Mixer, Up Converter Mixer. More details for 312D can be seen below.