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Proceedings Paper

Superconductive hot-electron mixers for terahertz heterodyne receiver applications
Author(s): William R. McGrath; Anders J. Skalare; Boris S. Karasik; Michael C. Gaidis; Bruce Bumble; Henry G. LeDuc; P. J. Burke; R. Schoelkopf; D. E. Prober
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Paper Abstract

We report on the development of quasioptical Nb hot-electron bolometer mixers for heterodyne receivers operating at 1 THz 3 THz. The devices have submicron in-plane sizes, thus exploiting diffusion as the electron cooling mechanism. Quasioptical mixer circuits have been developed with planar double-dipole or twin-slot antennas. The measured (DSB) receiver noise temperatures are 1670 K at 1.1 THz, with an estimated mixer noise temperature of approximately equals 1060 K, and 2750 K at 2.5 THz, with an estimated mixer noise temperature of approximately equals 900 K. The IF bandwidth is found to scale as the length-squared, and bandwidths as high as 8 GHz have been measured. These results demonstrate the low-noise, broadband operation of the diffusion-cooled bolometer mixer over a wide range of far-infrared wavelengths.

Paper Details

Date Published: 31 July 1998
PDF: 8 pages
Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); doi: 10.1117/12.317341
Show Author Affiliations
William R. McGrath, Jet Propulsion Lab. (United States)
Anders J. Skalare, Jet Propulsion Lab. (United States)
Boris S. Karasik, Jet Propulsion Lab. (United States)
Michael C. Gaidis, Jet Propulsion Lab. (United States)
Bruce Bumble, Jet Propulsion Lab. (United States)
Henry G. LeDuc, Jet Propulsion Lab. (United States)
P. J. Burke, Yale Univ. (United States)
R. Schoelkopf, Yale Univ. (United States)
D. E. Prober, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 3357:
Advanced Technology MMW, Radio, and Terahertz Telescopes
Thomas G. Phillips, Editor(s)

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