1 October 1991 Two-dimensional electron gas hot-electron mixers for millimeter waves and submillimeter waves
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15761Z (1991) https://doi.org/10.1117/12.2297784
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
Present state-of-the-art Schottky and SIS mixer receiver noise temperatures (TRX) range from roughly 300K at 0.3 THz to 3000K at 1 THz, while TRTRX for InSb hot electron mixers varies from 300K to 500K in the same frequency range. It is natural to ascribe the much more gradual frequency dependence of TRX for the hot electron mixer to its bulk nature, which minimizes parasitic reactances. A hot electron mixer requires an electron gas with high mobility which can be heated by the LO power, and a change in the mobility or carrier concentration as a result of this heating. Smith et al. (1987) pointed out that the two-dimensional electron gas in the channel of FIFET devices at liquid helium temperatures constitutes a potentially excellent nonlinear medium of the required type, which would also attain a much wider IF bandwidth than the InSb mixer (GHz versus a few MHz).
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J.-X. Yang, J.-X. Yang, } "Two-dimensional electron gas hot-electron mixers for millimeter waves and submillimeter waves", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15761Z (1 October 1991); doi: 10.1117/12.2297784; https://doi.org/10.1117/12.2297784
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