Applications of high-T/sub c/ superconductors in sub-Gigahertz r.f. cavity resonators

Centeno, A.E. and Excell, P.S. (1995) Applications of high-T/sub c/ superconductors in sub-Gigahertz r.f. cavity resonators. IEEE Transactions on Applied Superconductivity, 5(2), pp. 2660-2662. (doi: 10.1109/77.403137)

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Abstract

The size of cavity resonators below 1 GHz may be reduced by using dielectric or helical loading. With normal conductors, such electrically small resonators suffer problems of losses and inadequate Q-factor. However, by using superconductor in the portions with the highest current density, very good performance may be obtained with very electrically-small cavities. A cylindrical dielectric resonator was used to load a corrugated cavity, having YBaCuO thick-film end plates, and operated at VHF. The results showed a significant improvement over corrugated cavities with copper end plates. Investigations have also been undertaken with high-T/sub c/ superconductor helical loading. The size of the cavities was electrically very small (about 0.02 of free space wavelength), and results with both bulk and thick-film helical loading elements were obtained. The results showed a significant improvement over a similar copper helically-loaded cavity resonator.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Centeno, Dr Anthony
Authors: Centeno, A.E., and Excell, P.S.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Transactions on Applied Superconductivity
Publisher:IEEE
ISSN:1051-8223
ISSN (Online):1558-2515

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