Comparative study for bolometric and nonbolometric switching elements for microwave phase shifters

Massood Tabib-Azar; Kul B. Bhasin; Robert R. Romanofsky

doi:10.1117/12.45600

1 July 1991 Comparative study for bolometric and nonbolometric switching elements for microwave phase shifters

Massood Tabib-Azar, Kul B. Bhasin, Robert R. Romanofsky

Proceedings Volume 1477, Superconductivity Applications for Infrared and Microwave Devices II; (1991) https://doi.org/10.1117/12.45600
Event: Orlando '91, 1991, Orlando, FL, United States

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.

Citation Download Citation

Massood Tabib-Azar, Kul B. Bhasin, and Robert R. Romanofsky "Comparative study for bolometric and nonbolometric switching elements for microwave phase shifters", Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991); https://doi.org/10.1117/12.45600

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