标签分布疏密状态变化情形下超高频天线设计方法研究

佐磊; 曹雪兵; 朱良帅; 丁雨晴; 孙梦婷

doi:10.11999/JEIT211281

标签分布疏密状态变化情形下超高频天线设计方法研究

doi: 10.11999/JEIT211281

佐磊^{1, 2, ,},
曹雪兵¹,
朱良帅¹,
丁雨晴¹,
孙梦婷¹

1.
合肥工业大学电气与自动化工程学院合肥 230009
2.
合肥工业大学可再生能源接入电网技术国家地方联合工程实验室合肥 230009

基金项目: 国家自然科学基金(61971175, 51777050)

详细信息

作者简介:
佐磊：男，副教授，硕士生导师，研究方向为射频识别技术、物联网技术、信号处理及智能电网等

曹雪兵：男，硕士生，研究方向为射频识别技术和抗金属标签天线

朱良帅：男，硕士生，研究方向为射频识别技术和物联网技术

丁雨晴：女，硕士生，研究方向为射频识别技术和信号处理

孙梦婷：女，硕士生，研究方向为射频识别技术和标签天线设计

通讯作者:
佐磊　benzl0313@162.com

中图分类号: TN828; TP391.45
计量
- 文章访问数: 290
- HTML全文浏览量: 201
- PDF下载量: 95
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-17
- 修回日期: 2022-05-17
- 录用日期: 2022-05-24
- 网络出版日期: 2022-05-27
- 刊出日期: 2023-01-17

Research on the Design Method of UHF Antenna under the Condition of Changing Tag Distribution Density

1.
Institute of Electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, China
2.
National and Local Joint Engineering Laboratory for Renewable Energy Access to Grid Technology, Hefei University of Technology, Hefei 230009, China

Funds: The National Natural Science Foundation of China (61971175, 51777050)

摘要

摘要: 针对标签分布疏密程度的变化会导致其天线与负载的阻抗匹配关系改变进而影响系统性能的问题。该文结合电磁波传播理论和射频识别(RFID)工作原理，导出了标签分别处于稀疏和密集分布状态下的RFID系统通信链路模型；结合变压器模型和二端口网络分析方法，推导了标签密集分布状态时标签天线的互阻抗表达式；利用功率传输系数和反向散射调制因子，分析了标签分布疏密程度对RFID系统性能的影响；基于加载条匹配原理，提出一种适用于分布疏密状态变化情形的标签天线优化设计方法。仿真实验和实际测量结果表明，标签密集分布时，改进标签的性能较原型标签提升16%；标签稀疏分布时，改进标签的性能达到原型标签的96%。
- 天线 /
- 天线设计 /
- 射频识别 /
- 分布状态 /
- 耦合效应
Abstract: In view of the problem that the change of the density of the label distribution will lead to the change of the impedance matching relationship between the antenna and the load, and then affect the system performance. Based on the theory of electromagnetic wave propagation and the working principle of Radio Frequency IDentification (RFID), the communication link models of RFID system with sparse and dense tags are derived. Based on the transformer model and the two-port network analysis method, the mutual impedance expression of the tag antenna in the dense distribution state is derived. Using power transmission coefficient and backscattering modulation factor, the influence of tag density on RFID system performance is analyzed. Based on the principle of loading bar matching, an optimal design method for label antenna is proposed. Simulation and actual measurement results show that the performance of the improved tag is 16% higher than that of the prototype tag when the tags are densely distributed. When the tags are sparsely distributed, the performance of the improved tags reaches 96% of that of the prototype tags.
- Antenna /
- Antenna Design /
- Radio Frequency IDentification (RFID) /
- Distribution Status /
- Coupling Effect

HTML全文

图 1 双标签密集布放及其等效二端口网络模型

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图 2 标签稀疏布放时传输系数与标签间距关系

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图 3 标签密集布放时传输系数与标签间距关系

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图 4 基于加载条匹配的天线模型及等效电路

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图 5 标签天线仿真模型图

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图 6 加载条参数变化对天线的影响

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图 7 双标签仿真模型及仿真结果

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图 8 标签调制因子随标签间距变化图

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图 9 标签性能测试实验场景

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图 10 标签返回信号强度随$ \theta $的变化

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图 11 标签群读实验

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图 12 标签读取率

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表 1 密集环境下标签群读实验

标签数量n(枚) 标签1 标签2 标签3

9 7 8 9
12 8 10 10
15 10 11 12
18 12 14 15
21 13 16 18

下载: 导出CSV

表 2 稀疏环境下标签群读实验

标签数量n(枚) 标签1 标签2 标签3

9 9 8 7
12 11 9 8
15 13 13 9
18 16 15 12
21 18 17 14

下载: 导出CSV

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