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超高頻射頻識別近場系統(tǒng)互耦效應(yīng)中頻率偏移研究

何怡剛,  佘培亮,  佐磊,  張超群

何怡剛, 佘培亮, 佐磊, 張超群. 超高頻射頻識別近場系統(tǒng)互耦效應(yīng)中頻率偏移研究[J]. 電子與信息學(xué)報, 2019, 41(3): 602-610. doi: 10.11999/JEIT180375
引用本文: 何怡剛, 佘培亮, 佐磊, 張超群. 超高頻射頻識別近場系統(tǒng)互耦效應(yīng)中頻率偏移研究[J]. 電子與信息學(xué)報, 2019, 41(3): 602-610. doi: 10.11999/JEIT180375
Yigang HE, Peiliang SHE, Lei ZUO, Chaoqun ZHANG. Study on Frequency Shift in Mutual Coupling Effect of Ultra-high-frequency Radio Frequency IDentification Near-field System[J]. Journal of Electronics & Information Technology, 2019, 41(3): 602-610. doi: 10.11999/JEIT180375
Citation: Yigang HE, Peiliang SHE, Lei ZUO, Chaoqun ZHANG. Study on Frequency Shift in Mutual Coupling Effect of Ultra-high-frequency Radio Frequency IDentification Near-field System[J]. Journal of Electronics & Information Technology, 2019, 41(3): 602-610. doi: 10.11999/JEIT180375

超高頻射頻識別近場系統(tǒng)互耦效應(yīng)中頻率偏移研究

doi: 10.11999/JEIT180375

  • 合肥工業(yè)大學(xué)電氣與自動化工程學(xué)院 ??合肥 ??230000

基金項目: 國家自然科學(xué)基金(51577046, 51637004)，國家重點研發(fā)計劃(2016YFF0102200)
詳細信息
    作者簡介:

    何怡剛：男，1966年生，教授，博士生導(dǎo)師，研究方向為射頻識別技術(shù)、高速低壓低耗集成電路、物聯(lián)網(wǎng)技術(shù)、混合信號電路與系統(tǒng)測試與診斷等

    佘培亮：男，1993年生，碩士生，研究方向為射頻識別技術(shù)和標簽集成電路設(shè)計與測試等

    佐磊：男，1982年生，副教授，碩士生導(dǎo)師，研究方向為射頻識別技術(shù)、物聯(lián)網(wǎng)技術(shù)、信號處理及智能電網(wǎng)等

    張超群：女，1994年生，碩士生，研究方向為射頻識別技術(shù)和物聯(lián)網(wǎng)技術(shù)等

    通訊作者:

    何怡剛　18655136887@163.com

  • 中圖分類號: TN801; TP391.45

Study on Frequency Shift in Mutual Coupling Effect of Ultra-high-frequency Radio Frequency IDentification Near-field System

  • School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230000, China

Funds: The National Natural Science Foundation of China (51577046, 51637004), The National Key Research and Development Plan (2016YFF0102200)
  • 摘要:

    在超高頻射頻識別(UHF RFID)系統(tǒng)近場(NF)密集標簽應(yīng)用中，由于微帶標簽天線的結(jié)構(gòu)特點，傳統(tǒng)線圈間互阻抗表達式在預(yù)估系統(tǒng)頻率偏移等互耦效應(yīng)問題方面誤差較大，精確性不夠。首先，基于變壓器模型，從無線電能傳輸?shù)慕嵌韧茖?dǎo)了近場密集標簽間的互阻抗表達式。然后，結(jié)合近場電感耦合型標簽，通過建立電磁仿真模型間接獲取有關(guān)電氣參數(shù)值。最后，驗證推導(dǎo)公式并從影響雙標簽間互阻抗的環(huán)境因素角度去研究UHF RFID近場頻率偏移問題。測試結(jié)果表明，當標簽間距小于30 mm時，推導(dǎo)的互阻抗表達式應(yīng)用于頻率偏移計算誤差范圍為1.6～7.3 MHz。研究結(jié)果為基于標簽間互阻抗預(yù)估UHF RFID近場標簽間的互耦效應(yīng)問題提供了參考依據(jù)。

    Abstract:

    In Near-Field (NF) applications of Ultra-High-Frequency Radio Frequency IDentification (UHF RFID) systems, due to the structural characteristics of the microstrip tag, the traditional inter-coil mutual impedance expression has a large error in the estimation of the mutual coupling effect such as the frequency shift of the prediction system, and the accuracy is not enough. Firstly, based on the transformer model, the mutual impedance expressions of the NF dense tags are derived from the perspective of radio energy transmission. Then, the electrical parameter values are obtained indirectly by establishing the electromagnetic simulation model combining with the NF inductance coupling tag. Finally, the derivation formula is verified and UHF RFID NF frequency shift is studied from the perspective of environmental factors that affect the mutual impedance between the two tags. The test results show that the derived mutual impedance expression is applied to the frequency offset calculation with error range in 1.6～7.3 MHz when the tags’ spacing is less than 30 mm. The results provide a reference for studying the mutual coupling effect between UHF RFID NF tags based on the mutual impedance between tags.

    • HTML全文

  • 圖  1  UHF RFID近場磁場耦合電路模型

    圖  2  雙標簽互耦等效二端口網(wǎng)絡(luò)

    圖  3  雙標簽電感耦合等效電路

    圖  4  標簽

    圖  5  標簽J41的回波損耗性能

    圖  6  HFSS下的雙標簽互耦仿真模型圖

    圖  8  雙標簽布放不同時耦合系數(shù)與距離的關(guān)系

    圖  7  標簽間插入損耗曲線圖(垂直疊放)

    圖  9  不同距離下的標簽間互阻抗仿真值

    圖  10  標簽間的互阻抗虛部理論值與仿真值對比

    圖  11  標簽1受到互耦時的工作頻率偏移

    圖  12  實驗布置示意圖

    圖  13  $ Δf$ 隨d12及$\theta$的變化圖

    圖  14  $ Δf$ 隨標簽間相對位置的變化

    圖  15  $ Δf$ 隨 ${\cal E}_ {\rm{r}}$的變化($\theta={0^ \circ }$)

    表  1  標簽?zāi)Ｐ蛥?shù)(mm)

    參數(shù)名稱$h$${r_0}$${r_1}$${r_2}$${a_1}$${a_2}$$l$
    數(shù)值0.058.005.905.20$2\sqrt 2 $$2\sqrt 2 - 1.4$04.20
    下載: 導(dǎo)出CSV
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  • 收稿日期:  2018-04-24
  • 修回日期:  2018-09-10
  • 網(wǎng)絡(luò)出版日期:  2018-09-21
  • 刊出日期:  2019-03-01

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