Microwave rotation sensor based on reflection phase in transmission lines terminated with lumped resonators
Mehrjoo, Zahra (Royal Melbourne Institute of Technology)
Ebrahimi, Amir (Royal Melbourne Institute of Technology)
Beziuk, Grzegorz (Royal Melbourne Institute of Technology)
Martín, Ferran (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date:	2023
Abstract:	A phase variation-based rotation sensor is presented in this article. The sensor is realized using a coplanar waveguide (CPW) terminated with a stepped impedance LC resonator. A circular dielectric slab is rotating above the resonator. Rotation of the slab modifies the overall capacitance and, thus, the input impedance of the resonator. This, in turn, modifies the phase of the reflection coefficient, which is translated to the rotation angle. The sensor's linearity is eventually enhanced by tapering the width of the capacitive metallic patch along the rotation direction. The operation and sensing performance are studied in detail, using a circuit-based analysis and electromagnetic (EM) simulations. The designed sensor is capable of detecting the direction of rotation. A sensor prototype is fabricated and experimentally measured to prove the developed design and analysis procedure.
Grants:	Agencia Estatal de Investigación PID2019-103904RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Microwave sensors ; Phase variation sensors ; Reflective mode sensors ; Rotation sensors
Published in:	IEEE sensors journal, Vol. 23, issue 7 (April 2023) , p. 6571-6580, ISSN 1558-1748

DOI: 10.1109/JSEN.2023.3236638

Available from: 2025-04-30 Postprint

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > CIMITEC-UAB
Articles > Research articles
Articles > Published articles