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Proceedings Paper

Comparative study for bolometric and nonbolometric switching elements for microwave phase shifters
Author(s): Massood Tabib-Azar; Kul B. Bhasin; Robert R. Romanofsky
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Paper Abstract

The performance of semiconductor and high critical temperature superconductor switches is compared as they are used in delay-line-type microwave and millimeter-wave phase shifters. Such factors as their ratios of the off-to-on resistances, parasitic reactances, power consumption, speed, input-to-output isolation, ease of fabrication, and physical dimensions are compared. Owing to their almost infinite off-to-on resistance ratio and excellent input-to-output isolation, bolometric superconducting switches appear to be quite suitable for use in microwave phase shifters; their only drawbacks are their speed and size. The SUPERFET, a novel device whose operation is based on the electric field effect in high critical temperature ceramic superconductors is also discussed. Preliminary results indicate that the SUPERFET is fast and that it can be scaled; therefore, it can be fabricated with dimensions comparable to semiconductor field-effect transistors.

Paper Details

Date Published: 1 July 1991
PDF: 10 pages
Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991); doi: 10.1117/12.45600
Show Author Affiliations
Massood Tabib-Azar, Case Western Reserve Univ. (United States)
Kul B. Bhasin, NASA/Lewis Research Ctr. (United States)
Robert R. Romanofsky, NASA/Lewis Research Ctr. (United States)


Published in SPIE Proceedings Vol. 1477:
Superconductivity Applications for Infrared and Microwave Devices II
Vernon O. Heinen; Kul B. Bhasin, Editor(s)

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