Research on the Design Method of UHF Antenna under the Condition of Changing Tag Distribution Density
-
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%。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.
-
Key words:
- Antenna /
- Antenna Design /
- Radio Frequency IDentification (RFID) /
- Distribution Status /
- Coupling Effect
-
[1] BUFFI A, NEPA P, and MANARA G. Analysis of near-field coupling in UHF-RFID systems[C]. 2011 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), Turin, Italy, 2011: 931–934. [2] KATAGI T, OHMINE H, MIYASHITA H, et al. Analysis of mutual coupling between dipole antennas using simultaneous integral equations with exact kernels and finite gap feeds[J]. IEEE Transactions on Antennas and Propagation, 2016, 64(5): 1979–1984. doi: 10.1109/TAP.2016.2537384 [3] LU Feng, CHEN Xiaosheng, and YE T T. Performance analysis of stacked RFID tags[C]. 2009 IEEE International Conference on RFID, Orlando, USA, 2009: 330–337. [4] 李忠建, 张雪凡, 叶旸, 等. 多标签环境下RFID系统的受限链路[J]. 电子测量技术, 2016, 39(1): 9–13. doi: 10.19651/j.cnki.emt.2016.01.003LI Zhongjian, ZHANG Xuefan, YE Yang, et al. Link constrains in RFID with intensive tags[J]. Electronic Measurement Technology, 2016, 39(1): 9–13. doi: 10.19651/j.cnki.emt.2016.01.003 [5] 彭章友, 任秀方, 孟春阳, 等. 超高频射频识别小间隔双标签天线增益特性研究[J]. 电子与信息学报, 2015, 37(7): 1774–1778. doi: 10.11999/JEIT141371PENG Zhangyou, REN Xiufang, MENG Chunyang, et al. Study on gain characteristics of dual ultra-high-frequency radio frequency identification tag antennas with small interval[J]. Journal of Electronics &Information Technology, 2015, 37(7): 1774–1778. doi: 10.11999/JEIT141371 [6] 燕怒, 李达, 韩冬桂, 等. 密集环境下无源超高频系统RFID标签识别性能研究[J]. 现代电子技术, 2019, 42(14): 18–21,26. doi: 10.16652/j.issn.1004-373x.2019.14.005YAN Nu, LI Da, HAN Donggui, et al. Research on RFID tag recognition performance of passive UHF system in dense environment[J]. Modern Electronics Technique, 2019, 42(14): 18–21,26. doi: 10.16652/j.issn.1004-373x.2019.14.005 [7] 周春. 基于磁耦合UHF频段RFID近场天线研究[D]. [硕士论文], 南京航空航天大学, 2019.ZHOU Chun. Research on near-field RFID antenna based on magnetic coupling in UHF band[D]. [Master dissertation], Nanjing University of Aeronautics and Astronautics, 2019. [8] 佐磊, 何怡刚, 李兵, 等. 标签密集环境下天线互偶效应研究[J]. 物理学报, 2013, 62(4): 044102. doi: 10.7498/aps.62.044102ZUO Lei, HE Yigang, LI Bing, et al. Theory and measurement for mutual coupling effect of ultra high frequency radio-frequency identification in dense environments[J]. Acta Physica Sinica, 2013, 62(4): 044102. doi: 10.7498/aps.62.044102 [9] 何怡刚, 佘培亮, 佐磊, 等. 超高频射频识别近场系统互耦效应中频率偏移研究[J]. 电子与信息学报, 2019, 41(3): 602–610. doi: 10.11999/JEIT180375HE Yigang, SHE Peiliang, ZUO Lei, et al. 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 [10] MARROCCO G. The art of UHF RFID antenna design: Impedance-matching and size-reduction techniques[J]. IEEE Antennas and Propagation Magazine, 2008, 50(1): 66–79. doi: 10.1109/MAP.2008.4494504 [11] 何洋. 缝隙结构天线在新型RFID标签设计中的应用研究[D]. [硕士论文], 中国科学技术大学, 2017.HE Yang. On the design of novel RFID tags with modified slot antenna[D]. [Master dissertation], University of Science and Technology of China, 2017. [12] LI Haotian, CHEN Yikai, XING Zijian, et al. A novel printed dual-log-periodic array antenna for UHF near-field RFID applications[J]. IEEE Transactions on Antennas and Propagation, 2018, 66(12): 7418–7423. doi: 10.1109/TAP.2018.2874202 [13] 彭章友, 孟春阳, 任秀方, 等. 密集布放环境下的标签互阻设计方法[J]. 电子与信息学报, 2015, 37(6): 1304–1309. doi: 10.11999/JEIT141340PENG Zhangyou, MENG Chunyang, REN Xiufang, et al. Design of stacked tags for mutual impedance in intensive distribution environment[J]. Journal of Electronics &Information Technology, 2015, 37(6): 1304–1309. doi: 10.11999/JEIT141340 [14] DOBKIN D M. The RF in RFID: UHF RFID in Practice[M]. 2nd ed. Boston: Newnes, 2013: 286–300. [15] KRAUS J D and MARHEFKA R J. Antennas for All Applications[M]. 3rd ed. New York: The McGraw-Hill Companies, Inc. , 2002: 158–166. [16] EBRAHIMI-ASL S, GHASR M T A, and ZAWODNIOK M J. A solution to low read rate problem in RFID scattering networks[J]. IEEE Journal of Radio Frequency Identification, 2017, 1(2): 176–184. doi: 10.1109/JRFID.2017.2768546 [17] EBRAHIMI-ASL S, AHMAD GHASR M T, and ZAWODNIOK M. Cooperative interference control in neighboring passive scattering antennas[J]. IEEE Journal of Radio Frequency Identification, 2018, 2(3): 152–158. doi: 10.1109/JRFID.2018.2832190 [18] 赵琦. 超材料无线射频能量收集RFID标签系统[D]. [硕士论文], 西安电子科技大学, 2019.ZHAO Qi. Metamaterial RFID tag system with wireless RF power harvesting[D]. [Master dissertation], Xidian University, 2019. [19] 钟顺时. 天线理论与技术[M]. 北京: 电子工业出版社, 2011: 96–100.ZHONG Shunshi. Antenna Theory and Techniques[M]. Beijing: Publishing House of Electronics Industry, 2011: 96–100. [20] ZHU Jixuan, JIN Cheng, and LIU Huan. Mutual inductance modeling of two coaxial solenoid antennas with large ferrite core for underground RFID applications[J]. IEEE Transactions on Magnetics, 2021, 57(8): 9400104. doi: 10.1109/TMAG.2021.3081370 -
下载:
图(12) / 表(2)
计量
- 文章访问数: 440
- HTML全文浏览量: 257
- PDF下载量: 100
- 被引次数: 0
下载:
