Battery-less RFID-Based Wireless Sensor Architectures for 5G IoT Applications

• Author / Creator

  Khalid, Nabil

• In this thesis, novel battery-less wireless sensor architectures and sensing elements are proposed and demonstrated. The proposed passive wireless sensor architectures integrate a UHF RFID chip, and a UHF sensing element to enable the reading of environmental conditions wirelessly, without increasing the complexity of a typical RFID chip and substantial loss of read range of the chip. The architectures are designed so that the sensor only changes the phase of the reflected RFID signal, with minimal affects to the incoming interrogator signal to ensure optimal range. The phase change is detected by the reader using a non-coherent IQ demodulator. Since the sensing elements must be responsive at UHF, novel sensing elements are designed and reported.

• Subjects / Keywords

  • battery-less
  • direct conversion
  • passive sensing
  • radio frequency identification (RFID)
  • six-port
  • wireless sensor
  • zero-power sensor

• Graduation date

  Spring 2023

• Type of Item

  Thesis

• Degree

  Doctor of Philosophy

• DOI

  https://doi.org/10.7939/r3-mv7t-zx13

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.