Hot-electron superconducting mixers for 20-500 GHz operation

A. Dzardanov

doi:10.1117/12.2303174

1 January 1994 Hot-electron superconducting mixers for 20-500 GHz operation

A. Dzardanov

Proceedings Volume 2250, International Conference on Millimeter and Submillimeter Waves and Applications 1994; 22504D (1994) https://doi.org/10.1117/12.2303174
Event: Millimeter and Submillimeter Waves and Applications: International Conference, 1994, San Diego, CA, United States

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.

Citation Download Citation

A. Dzardanov "Hot-electron superconducting mixers for 20-500 GHz operation", Proc. SPIE 2250, International Conference on Millimeter and Submillimeter Waves and Applications 1994, 22504D (1 January 1994); https://doi.org/10.1117/12.2303174

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