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Algorithm for resonator parameter extraction from symmetrical and asymmetrical transmission responses

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Accepted manuscript prior to IEEE edition (1,792Mb)
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10.1109/TMTT.2021.3081730
 
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hdl:2117/347020

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Krkotic, PatrickMés informacióMés informacióMés informació
Gallardo Moix, QueraltMés informació
Tagdulang, NikkiMés informacióMés informació
Pont Montaner, MontserratMés informació
O'Callaghan Castellà, Juan ManuelMés informacióMés informacióMés informació
Document typeArticle
Defense date2021-08
PublisherIEEE Microwave Theory and Techniques Society
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
We describe an algorithm capable of extracting the unloaded quality factor and the resonant frequency of microwave resonators from vector S-parameters. Both symmetrical (Lorentzian) and asymmetrical (Fano) transmission responses are supported. The algorithm performs an adaptive outlier removal to discard measurement points affected by noise or distortion. It removes the effects caused by imperfections in the device (such as modes with close resonance frequencies or stray coupling between the resonator ports) or the experimental setup (such as lack of isolation or dispersion in the test set and cables). We present an extensive assessment of the algorithm performance based on a numerical perturbation analysis and the evaluation of S-parameter fitting results obtained from network analyzer measurements and resonator equivalent circuits. Our results suggest that uncertainty is mainly caused by factors that distort the frequency dependence of the S-parameters, such as cabling and coupling networks, and is highly dependent on the device measured. Our perturbation analysis shows improved results with respect to those of previous publications. Our source code is written in Python using open-source packages and is publicly available under a freeware license.
CitationKrkotic, P. [et al.]. Algorithm for resonator parameter extraction from symmetrical and asymmetrical transmission responses. "IEEE transactions on microwave theory and techniques", Agost 2021, vol. 69, núm. 8, p. 3917-3926. 
URIhttp://hdl.handle.net/2117/347020
DOI10.1109/TMTT.2021.3081730
ISSN0018-9480
Publisher versionhttps://ieeexplore.ieee.org/document/9447550
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