A Wireless Metamaterial-Inspired Passive Rotation Sensor With Submilliradian Resolution

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Gargari A. M. , Ozbey B., DEMİR H. V. , ALTINTAŞ A., Albostan U. , KURÇ Ö. , ...More

IEEE SENSORS JOURNAL, vol.18, no.11, pp.4482-4490, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 11
  • Publication Date: 2018
  • Doi Number: 10.1109/jsen.2018.2822671
  • Title of Journal : IEEE SENSORS JOURNAL
  • Page Numbers: pp.4482-4490


A novel passive wireless rotation sensing system with high levels of sensitivity and resolution is proposed and demonstrated for measuring elastic-region bending in materials such as steel. This system is composed of a transceiver antenna and a double-plate sensor in the form of an inter-digital configuration, which does not incorporate any active component. The sensor exhibits a large rotation resolution of 20 mu-rad, an excellent sensitivity of 28 MHz/degrees in average, and a large linear dynamic range of approximately 40 degrees. In operation, as a result of the relative rotation between the plates of the sensor, the operating resonance frequency of the system is shifted. This is read out and tracked in the S-11 response of the transceiver antenna from which the rotation angle is determined. The prototype is designed for microwave regime and it is suitable for measuring very small angles (10(-4) similar to 10(-5) rad). Critical figuresof-merit of the sensor including sensitivity, dynamic range, and resolution are assessed via systematic measurements, and the validity of resolution experiment is verified by employing digital image correlation method for 2-D measurements.