14 December 1992 2deg electron bolometric mixers: new results and potential for low-noise thz receivers
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Proceedings Volume 1929, 17th International Conference on Infrared and Millimeter Waves; 19292W (1992) https://doi.org/10.1117/12.2298221
Event: 17th International Conference on Infrared and Millimeter Waves, 1992, Pasadena, CA, United States
Abstract
While SIS and Schottky barrier mixers have demonstrated decreasing receiver noise temperatures up to 500 GHz in the last few years, there is still a lack of very low noise receivers above that frequency. The bulk InSb hot electron (bolometric) mixer is outstanding in terms of noise temperature ( 500 K DSB at 0.8 THz), which indicates that bolometric, bulk mode, mixers have an intrinsic advantage at the higher frequencies. The InSb mixer has the major drawback of a very narrow ( 1 MHz) bandwidth. Smith et al. (1987)[1] proposed the use of the Two-Dimensional Electron Gas (2DEG), biased to cyclotron resonance, as a new mixer medium in order to solve this problem, and realized a direct detector. We have used the same medium in a different mode [2], and demonstrated a hot electron mixer with a three orders of magnitude increase in the bandwidth, compared with the InSb mixer.
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J.-X. Yang, J.-X. Yang, } "2deg electron bolometric mixers: new results and potential for low-noise thz receivers", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 19292W (14 December 1992); doi: 10.1117/12.2298221; https://doi.org/10.1117/12.2298221
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