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Distance Sensing of an RFID Tag Using RFID Reader Frequency Control

RFID 리더의 주파수 조정을 통한 태그 위치 센싱

Baik, Kyung-Jin;Jang, Byung-Jun
백경진;장병준

  • Received : 2019.02.14
  • Accepted : 2019.04.05
  • Published : 2019.05.31

Abstract

UHF and microwave RFID systems are widely applied in various fields because they can read a plurality of tag information within a radius of several meters ahead of the RFID reader. However, they cannot detect the position of the tag in applications that recognize only a tag at a specific position. In this study, we propose a new RFID system that can interrogate the tag of a specific location selectively by using the position information of the tag. This can be done by only adjusting the reader's operating frequency. To verify the feasibility of the proposed system, we implemented a 2.4 GHz RFID reader whose frequency can be varied by using a phase-locked loop circuit and a backscattered tag. Experimental results confirm that the tag position can be sensed exactly.

Keywords

Doppler Radar;Distance Sensing;2.4 GHz Radar;Multi-Tone Radar;Gesture Sensing

Acknowledgement

Supported by : 삼성전자