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Split frequencies and susceptances of the three port junction circulator from an experimental determination of the complex gyrator circuit

Helszajn, Joseph; Sharp, John; Mackay, Mark

Authors

Joseph Helszajn

John Sharp

Mark Mackay



Abstract

The adjustment of the classic three port circulator involves an in-phase eigen-network and a pair of split counter-rotating ones. The purpose of this paper is to use some recent relationships to experimentally extract the split susceptances of the counter-rotating immittances and the susceptance slope parameter of the junction by having recourse to a 1-port measurement of its complex gyrator circuit. This is done under the assumption that the in-phase eigen-network of the junction may be idealized by an electric wall. The split frequencies of the counter-rotating eigen-networks of the circulator may also be deduced from this characterization and are in good agreement, under the same assumption, with those derived from 1-port measurements on a terminated circulator. The latter arrangement does not, however, allow the split susceptances of the counter-rotating eigen-networks to be deduced.

Citation

Helszajn, J., Sharp, J., & Mackay, M. (2008). Split frequencies and susceptances of the three port junction circulator from an experimental determination of the complex gyrator circuit. IEEE Transactions on Microwave Theory and Techniques, 56, 2213-2220. https://doi.org/10.1109/TMTT.2008.2003136

Journal Article Type Article
Publication Date 2008-10
Deposit Date May 24, 2012
Publicly Available Date May 24, 2012
Print ISSN 0018-9480
Electronic ISSN 1557-9670
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 56
Pages 2213-2220
DOI https://doi.org/10.1109/TMTT.2008.2003136
Keywords Circulators; non-reciprocal devices; eigenvalues; characterization; complex gyrator;
Public URL http://researchrepository.napier.ac.uk/id/eprint/5327
Publisher URL http://dx.doi.org/10.1109/TMTT.2008.2003136

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