Journal of Space Science and Technology

Journal of Space Science and Technology

Simultaneous Resolution and Dynamic Range Improvement in Microwave Phase-Variation Displacement Sensors

Document Type : Original Research Paper

Authors
Departament d’Enginyeria Electrònica, Universitat Autónoma de Barcelona, Bellaterra, Spain
Abstract
Abstract: In this paper, a reflective-mode phase-variation microwave moderate range displacement sensor is proposed. It consists of a reader which is a one-port microstrip line terminated with a matched load, and a movable resonator (etched in an independent substrate), which exhibits three different resonance frequencies, two of them in low frequency range and close to each other, and the third one at a higher frequency. The sensing mechanism is based on the motion of the resonator along the microstrip line, with a small airgap in between. The phase of the reflection coefficient at the three resonance frequencies of the resonator is recorded at the input port of the reader. As a result, the motion of the movable resonator can be characterized. The phase of the reflection coefficient at the two lower frequencies is used to enhance the dynamic range, while the phase at the higher frequency improves sensor resolution.

Index Terms—microstrip technology, microwave sensor, reflective-mode sensor, displacement sensor, phase-variation sensor.
Keywords
Subjects

Article Title Persian

Simultaneous Resolution and Dynamic Range Improvement in Microwave Phase-Variation Displacement Sensors

Authors Persian

امیرحسین کرمی هرستانی
فران پارده
فران مارتین
دانشکده مهندسی الکترونیک، دانشگاه خودمختار بارسلونا، بلاترا، اسپانیا
Abstract Persian

Abstract: In this paper, a reflective-mode phase-variation microwave moderate range displacement sensor is proposed. It consists of a reader which is a one-port microstrip line terminated with a matched load, and a movable resonator (etched in an independent substrate), which exhibits three different resonance frequencies, two of them in low frequency range and close to each other, and the third one at a higher frequency. The sensing mechanism is based on the motion of the resonator along the microstrip line, with a small airgap in between. The phase of the reflection coefficient at the three resonance frequencies of the resonator is recorded at the input port of the reader. As a result, the motion of the movable resonator can be characterized. The phase of the reflection coefficient at the two lower frequencies is used to enhance the dynamic range, while the phase at the higher frequency improves sensor resolution.

Keywords Persian

Index Terms—microstrip technology
Microwave sensor
Reflective-mode sensor
Displacement sensor
Phase-variation sensor
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Volume 18, Special Issue (S1)
In English
2025
Pages 34-40

  • Receive Date 26 January 2025
  • Revise Date 08 April 2025
  • Accept Date 15 April 2025
  • First Publish Date 21 April 2025