Abstract
Different configurations of MESFET mixers are compared in the 6 GHz band for intermediate frequencies ranging from 30 MHz to 1.5 GHz. Conversion gain of 10 dB associated with 4 dB SSB noise figure have been achieved. Results will be presented concerning a balanced module made up of two such mixers, image termination effect, cooling and the influence of 1/f noise. At 12 GHz, preliminary results obtained are 3.5 dB conversion gain and a 7.5 dB SSB noise figure.

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