一种用于射频识别阅读器的双频宽带圆极化天线

王丽黎; 高智勇; 杜忠红; 徐亚妮

doi:10.11999/JEIT230321

一种用于射频识别阅读器的双频宽带圆极化天线

doi: 10.11999/JEIT230321

王丽黎^{1, 2},
高智勇^1, ,,
杜忠红¹,
徐亚妮¹

1.
西安理工大学自动化与信息工程学院西安 710048
2.
西安市无线光通信与网络研究重点实验室西安 710048

基金项目: 国家自然科学基金(61771389)

详细信息

作者简介:
王丽黎：女，副教授，研究方向为微波与天线系统、先进导航技术

高智勇：男，硕士生，研究方向为双频宽带圆极化天线

杜忠红：男，博士生，研究方向为近距离天线阵元耦合抑制技术、新型微波毫米波器件等

徐亚妮：女，硕士生，研究方向为微带滤波天线

通讯作者:
高智勇　398131491@qq.com

中图分类号: TN822
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- 被引次数: 0
出版历程
- 收稿日期: 2023-04-26
- 修回日期: 2023-06-13
- 网络出版日期: 2023-06-20
- 刊出日期: 2024-03-27

A Dual-band Broadband Circular Polarized Antenna for Radio Frequency Identification Reader

WANG Lili^{1, 2},
GAO Zhiyong^{1
, ,},
DU Zhonghong¹,
XU Yani¹

1.
College of Automation and Information Engineering, Xi'an University of Technology, Xi’an 710048, China
2.
Xi'an Key Laboratory of Wireless Optical Communication and Network Research, Xi’an 710048, China

Funds: The National Natural Science Foundation of China (61771389)

摘要

摘要: 该文设计了一种紧凑的用作射频识别(RFID)阅读器的双频宽带圆极化天线。天线由弯折处理的矩形贴片、L形贴片和三角形地板构成，通过微带线进行馈电。两个辐射贴片分别独立控制高低两个频段，其轴比带宽也可独立调整，三角形地板可以使横向电流和纵向电流发生变化，从而改变横向电流和纵向电流的比值大小，实现圆极化性能。天线尺寸为0.92$ {\lambda _0} $×0.92$ {\lambda _0} $×0.0064$ {\lambda _0} $ ($ {\lambda _0} $为2.40 GHz时的自由空间波长)。测试结果表明在超高频(UHF)频段该天线实现了49%(0.77～1.27 GHz)的阻抗带宽和46%(0.84～1.34 GHz)的轴比带宽，在无线局域网(WLAN)频段实现了47.5%(1.54～2.50 GHz)的阻抗带宽和24.2%(1.96～2.50 GHz)的轴比带宽，可以完整覆盖UHF和WLAN两个频段，具有良好的辐射特性。与其他双频圆极化天线相比，该天线整体结构紧凑、设计简单、避免了使用复杂的馈电网络，且具有较宽的3 dB轴比带宽。
- 双频段 /
- 宽带 /
- 射频识别阅读器天线 /
- 圆极化天线
Abstract: A compact dual-band wideband circularly polarized antenna for Radio Frequency IDentification (RFID) reader is designed. The antenna consists of a curved rectangular patch, an L-shaped patch, and a triangular floor, which is fed through a microstrip line. The two radiation patches control the high and low frequency bands independently, and their axial ratio bandwidth can also be adjusted independently. The triangular floor can change the transverse current and the longitudinal current, so as to change the ratio of the transverse current and the longitudinal current to achieve circular polarization performance. The antenna dimensions are 0.92$ {\lambda _0} $×0.92$ {\lambda _0} $×0.0064$ {\lambda _0} $($ {\lambda _0} $ is the free space wavelength at 2.40 GHz). The measurement results show that the proposed antenna achieves an impedance bandwidth of 49% (0.77～1.27 GHz) and an axial ratio bandwith of 46% (0.84～1.34 GHz) in the Ultra High Frequency (UHF) band, and achieves 47.5% (1.54～2.50 GHz) impedance bandwidth and 24.2% (1.96～2.50 GHz) axial ratio bandwidth in Wireless Local Area Networks (WLAN) band. It can completely cover UHF and WLAN two frequency bands and has good radiation characteristics. Compared with other dual-frequency circular-polarized antennas, the antenna has compact structure and simple design, avoids the use of complex feed network, and has a wide bandwidth of 3 dB axial ratio.
- Dual band /
- Broadband /
- Radio Frequency IDentification (RFID) reader antenna /
- Circularly polarized antenna

HTML全文

图 1 天线结构图

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图 2 天线在1.1 GHz时的表面电流分布

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图 3 参数W3对天线性能影响

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图 4 参数W4对天线性能影响

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图 5 参数L4对天线性能影响

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图 6 天线实物和测试图

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图 7 天线实测和仿真对比图

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图 8 天线在0.9 GHz处仿真和测试辐射方向图

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图 9 天线在2.4 GHz处仿真和测试辐射方向图

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表 1 优化后的天线尺寸(mm)

W4	L5	W5	G1	G2	W6	L1
4	1.7	11	1	4	8	115

W1	L2	W2	W3	L4	G3	L3
115	48.7	26	3	34	7	36.3

下载: 导出CSV

表 2 本文天线与参考文献天线性能对比

文献	天线尺寸(mm³)	IBW_L(%)	IBW_H(%)	ABW_L(%)	ABW_H(%)
[10]	257×257×33	40.0	34.2	41.0	20.3
[11]	211×211×29.7	2.6	2.0	5.52	2.0
[15]	130×130×30	40.5	6.56	40.6	7.7
[16]	85×85×1.6	31.9	28.0	6.7	11.2
[18]	77×103×1	22.7	7.4	5.7	3.9
本文	115×115×0.8	49.0	47.5	46.0	24.2

下载: 导出CSV

参考文献(18)

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