A Resonator for Tunable Superconducting Power Filters with Cavities for 5 GHz Band

Kazunori YAMANAKA  Kazuaki KURIHARA  Akihiko AKASEGAWA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E93-C   No.4   pp.480-485
Publication Date: 2010/04/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E93.C.480
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Microwave
Keyword: 
cavity resonator,  tunable,  superconductor,  microwave filter,  

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Summary: 
A design of the tunable superconducting power filter is described. The filter consists of superconducting microwave cavities with a mechanical tuning method. The electromagnetic simulations using niobium cavity suggested that there were conditions where the resonator with high-unloaded Q can realize a fractional center frequency change of more than 10% by using a Nb rod moving in the cavity. The simulations approximated the resonant frequency dependence of the rod moved by a cryogenic actuator in the tunable cavity experiment. In addition, the simulation of the power handling capability showed a feasibility of the value more than 50 dBW.