Conclusions
The GaAs Schottky diode mounted in a crossed waveguide structure gives much more efficient conversion than previously used point contact devices, and the power output at the second harmonic is sufficient for use in recently developed cryogenically cooled mixers [10, 11]. The diodes have electrical properties which are similar to conventional mixer diodes and they can be fabricated using similar masks and processing techniques.
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References
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Schneider, M.V., Phillips, T.G. Millimeter wave frequency multiplier. Int J Infrared Milli Waves 2, 15–22 (1981). https://doi.org/10.1007/BF01007466
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DOI: https://doi.org/10.1007/BF01007466