A novel method to improve the subcarrier frequency accuracy for UHF RFID sensing system

Kuanfeng Tang, Chao Zhang, Maodong Wang, Shengliang Xu, Shujiang Ji, Na Yan, Hao Min, Jin Mitsugi

研究成果: Conference contribution

抄録

This paper presents a novel method to improve the subcarrier frequency accuracy of tag chip for UHF RFID sensing system based on EPC global Gen2 protocol. By changing the tag's response to the Write command, the tag returns the subcarrier before returning the response specified in the protocol. In this way, a frequency calibration loop will be established between reader and tag. This method not only enables a low-power oscillator with a precise frequency to be integrated into a tag chip, but also enables flexible configuration of the frequency. The tag chip containing this idea is fabricated in SMIC 0.18 μm CMOS process with a die size of 850 μm × 850 μm. Measurement results show that the proposed novel method can realize the calibration of the subcarrier frequency, and the subcarrier frequency deviation is less than ±0.385KHz in the range of 40KHz-640KHz. With this accuracy, the tag can be allocated up to 78 subcarrier communication channels.

本文言語English
ホスト出版物のタイトル2021 15th Annual IEEE International Conference on RFID, RFID 2021
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781665440905
DOI
出版ステータスPublished - 2021 4 27
イベント15th Annual IEEE International Conference on RFID, RFID 2021 - Virtual, Atlanta, United States
継続期間: 2021 4 272021 4 30

出版物シリーズ

名前2021 15th Annual IEEE International Conference on RFID, RFID 2021

Conference

Conference15th Annual IEEE International Conference on RFID, RFID 2021
国/地域United States
CityVirtual, Atlanta
Period21/4/2721/4/30

ASJC Scopus subject areas

  • 人工知能
  • コンピュータ ネットワークおよび通信
  • コンピュータ サイエンスの応用
  • 信号処理
  • 器械工学

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