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A low-cost reflection mode operated microwave resonator sensor for angular displacement detection

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  • Premsai Regalla
  • A. V. Praveen Kumar

Abstract

A low-cost microwave resonator sensor for angular displacement detection is proposed. The sensor uses a strip-loaded dielectric resonator (SLDR) as the key element. The sensor operates in the reflection mode, i.e. by producing a variation in the reflection coefficient (S11) according to the angular position of the SLDR relative to a microstrip transmission line. The primary advantage of the proposed strategy is its fixed-frequency operation enabling the S11 measurement with a low-cost reflectometer, thereby avoiding the costly vector network analyzer (VNA). Design modelling and initial analysis of the sensor are performed with ANSYS HFSS software. To demonstrate proof of concept, a sensor prototype is fabricated and experimentally characterized with a custom-made reflectometer. Results are compared against VNA-based measurements to be in decent agreement. The proposed sensor exhibits 0.43 dB/0 sensitivity over the dynamic range of 00–900.

Suggested Citation

  • Premsai Regalla & A. V. Praveen Kumar, 2024. "A low-cost reflection mode operated microwave resonator sensor for angular displacement detection," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(15), pages 1621-1634, October.
    • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:15:p:1621-1634
    DOI: 10.1080/09205071.2024.2394431
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