用于远距离、广覆盖 RFID 盘点的模式可重构、圆极化、高增益、阿基米德螺旋天线阵列

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Da Yi;Ren-Long Zhang;Ming-Chun Tang;Jing-Feng Fu;Yao Li;Xing-Xing Li;Huapeng Zhao;Richard W. Ziolkowski
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引用次数: 0

摘要

本文介绍了一种低成本、可重新配置图案、圆极化、高增益的射频识别(RFID)阅读器天线阵列。这是一个 2 美元乘 2 美元的阵列,其元件基于创新的阿基米德螺旋设计。设计了一个带有可切换延迟线的 4 路功率分配器馈电网络,可以重新配置阵列的辐射模式。由于实现了高增益和九种可重新配置的状态,所开发的读取器天线可应用于远距离、大覆盖范围的 RFID 盘点。制作的原型尺寸为1.15/times 1.15/times 0.07~\lambda _{L}^{3}$,频率为920 MHz,测得的轴向比(AR)分数带宽为4.6%,峰值实现增益(RG)为10.5 dBic(无馈电网络时为12 dBic)。其可重构图案的 RG 在所有方位角的 $\theta $ = $0^{\circ }\pm 45^{\circ }$ 范围内均大于 6 dBic。它还作为实用 RFID 系统的读取器天线在室外范围进行了测试。最大读取距离为 22.3 米。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pattern-Reconfigurable, Circularly Polarized, High-Gain, Archimedean Spiral Antenna Array for Long-Distance, Wide-Coverage RFID Inventorying
A low-cost, pattern-reconfigurable, circularly polarized, high-gain, radio-frequency identification (RFID) reader antenna array is presented. It is a $2\times2$ array whose elements are based on an innovative Archimedean spiral design. A 4-way power divider feed network with switchable delay lines is designed that enables reconfiguring the radiation patterns of the array. Because of its high realized gain and nine reconfigurable states, the developed reader antenna can be applied in long-distance, wide-coverage RFID inventorying. The fabricated prototype, with dimensions $1.15\times 1.15\times 0.07~\lambda _{L}^{3}$ at 920 MHz, achieves a measured axial-ratio (AR) fractional bandwidth of 4.6%, and a peak realized gain (RG) of 10.5 dBic (12 dBic without the feed network). The RG of its reconfigurable patterns is greater than 6 dBic within $\theta $ = $0^{\circ }\pm 45^{\circ }$ for all azimuth angles. It was also tested in an outdoor range as the reader antenna for a practical RFID system. The maximum read distance was 22.3 m.
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CiteScore
5.70
自引率
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