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Proceedings Paper

Hot-electron superconducting mixers for 20-500 GHz operation
Author(s): A. Dzardanov
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Paper Abstract

Bolometric mixers based on Nb and NbN superconducting thin films in the resistive state have been prepared for 20, 100 GHz and 350-500 GHz operation. The mixing mechanism is presumably of electron heating origin. Our measurements indicate that a conversion loss of about 6-8 dB can rather easily be achieved, and that the noise is reasonably low. The requirements on the operation mode and on the film parameters in order to obtain small conversion losses or even gain are discussed. For NbN films the availability of nearly 1 GHz IF bandwidth is experimentally demonstrated. NbN hot-electron mixers combined with slot-line tapered antenna on Si membrane or with double-dipole antenna on SiO2 substrate have been fabricated. The devices we study are considered to be very promising for use in heterodyne receivers from microwaves to terahertz frequencies.

Paper Details

Date Published: 1 January 1994
PDF: 3 pages
Proc. SPIE 2250, International Conference on Millimeter and Submillimeter Waves and Applications 1994, 22504D (1 January 1994); doi: 10.1117/12.2303174
Show Author Affiliations
A. Dzardanov, Moscow State Pedagogical Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 2250:
International Conference on Millimeter and Submillimeter Waves and Applications 1994
Mohammed N. Afsar, Editor(s)

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