The 920 series of harmonic waveguide mixers from MI-Wave operate from 26.5 to 140 GHz. These mixers have conversion losses ranging from 18 to 40 dB and have an LO frequency from 8 to 12 GHz. These mixers are used to downconvert signals using a Schottky barrier mixer diode. Measurements can be made by mixing the harmonic of the LO with the desired RF signal and observing the resulting IF. The 920 series is designed for applications where a diplexer is not required. These mixers can be used as frequency extenders to increase the range of spectrum analyzers. Various waveguide sizes and flange options are available.