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The design of a 215 GHz subharmonic waveguide mixer utilizing an antiparallel pair of quasivertical Schottky diodes is presented. The impedance matching is provided by series and parallel waveguide tuners. A single sideband noise temperature of 3500 K and conversion loss of 9.2 dB have been measured (antenna loss included).
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M�tt�nen et al. (2000) studied this question.
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