The M28HWD from OML Inc. is a Waveguide Mixer with RF Frequency 26.5 to 40 GHz, LO Frequency 26.5 to 40 GHz, IF Frequency DC to 2.4 GHz, Conversion Loss 31 dB, LO Drive Level 12 to 17 dBm. Tags: Harmonic Mixer. More details for M28HWD can be seen below.