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Microwave Displacement Sensor With Good Linearity and Dynamic Range Based on a Microstrip Line Pair Loaded With Movable Electric-LC Resonators
Karami-Horestani, Amirhossein (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Paredes, Ferran (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Sisó, Gerard (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Martín, Ferran (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Data: 2024
Resum: This article presents a linear displacement sensor exhibiting good linearity and dynamic range. The sensor consists of a pair of parallel microstrip lines both terminated with a matched load (the static part) and a pair of electric-LC (ELC) resonators tuned to different (but closely spaced) frequencies, etched in a movable substrate. By feeding the lines with harmonic signals tuned to the resonance frequencies of the ELC resonators, such signals are completely reflected back to the source provided that the ELCs are on top of the lines, coupled to them (i. e. , at short distance and with adequate orientation). The phase of the reflection coefficient of each line depends on the frequency of the feeding signal as well as on the distance between the input port and the corresponding ELC resonator and repeats every half-wavelength. Thus, by displacing the ELC pair longitudinally (axially) along the line pair, the position of the ELC pair with regard to the input ports can be retrieved. The main relevant advantage of the proposed structure is that the pair of phases of the reflection coefficients (the output variable) exhibits a periodic pattern with an ELC position that repeats each time the ELC pair has displaced a distance corresponding to the minimum common multiple (MCM) of the half-wavelengths of each signal. Thus, by considering closely spaced ELC frequencies (and hence half-wavelengths), the input dynamic range can be dramatically enhanced. This idea is validated by means of two designed and fabricated prototype displacement sensors fed with harmonic signals tuned to 2. 0 and 2. 5 GHz in one case and tuned to 2. 1 and 2. 3 GHz in the other case.
Ajuts: Agencia Estatal de Investigación PID2019-103904RB-I00
Agencia Estatal de Investigación PID2022-139181OB-I00
Agencia Estatal de Investigación PDC2021-121085-I00
Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00192
Agencia Estatal de Investigación PRE2020-093239
Nota: Altres ajuts: ICREA
Drets: Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Matèria: Electric-LC resonator ; Displacement sensor ; Microstrip technology ; Microwave sensor ; Phasevariation sensor ; Reflective-mode sensor
Publicat a: IEEE Sensors Journal, Vol. 24, Issue 13 (July 2024) , p. 20529 - 20538, ISSN 1530-437X

DOI: 10.1109/jsen.2024.3398420


Disponible a partir de: 2026-07-31
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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Enginyeries > CIMITEC-UAB
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2024-07-04, darrera modificació el 2024-12-04



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