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

ZUO Lei; CAO Xuebing; ZHU Liangshuai; DING Yuqing; SUN Mengting

doi:10.11999/JEIT211281

Volume 45 Issue 1

Jan. 2023

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Article Navigation > Journal of Electronics & Information Technology > 2023 > 45(1): 158-167

ZUO Lei, CAO Xuebing, ZHU Liangshuai, DING Yuqing, SUN Mengting. Research on the Design Method of UHF Antenna under the Condition of Changing Tag Distribution Density[J]. Journal of Electronics & Information Technology, 2023, 45(1): 158-167. doi: 10.11999/JEIT211281

Citation:

ZUO Lei, CAO Xuebing, ZHU Liangshuai, DING Yuqing, SUN Mengting. Research on the Design Method of UHF Antenna under the Condition of Changing Tag Distribution Density[J]. Journal of Electronics & Information Technology, 2023, 45(1): 158-167. doi: 10.11999/JEIT211281

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

doi: 10.11999/JEIT211281

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)

Received Date: 2021-11-17
Accepted Date: 2022-05-24
Rev Recd Date: 2022-05-17

Available Online: 2022-05-27

Publish Date: 2023-01-17

Abstract

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

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References(20)

References

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