Read-Rate Improvement in 920MHz RFID System with Circular-Polarized 2D Beam Scan R/W Antenna

2023 Fourteenth International Conference on Ubiquitous and Future Networks (ICUFN) Pub Date : 2023-07-04 DOI:10.1109/ICUFN57995.2023.10200725

Y. Yamao, Sora Funayama

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引用次数: 1

Abstract

Radio frequency identification (RFID) is a promising Internet of things (IoT) solution that bring about innovation in supply chain management. However, RFID has a read reliability issue in multipath radio propagation environment. In order to improve the reliability, we proposed a reader/writer (R/W) beam modulating scheme with a moving conductor. By modulating the R/W antenna beam, the multipath propagation structure can be changed and null points caused by standing waves are shifted. Thus, read success rate can be improved by the combination of repeated transmission and selection combining. In this paper, we propose a new 2D beam scan antenna for circular-polarized operation that is necessary for actual RFID systems. It has been confirmed from the simulation that the electric field distribution in a typical storage shelf can be changed by the proposed scheme. A prototype beam modulator with a decentered rotating circular conductor is fabricated and tested. RFID read measurement result shows that the proposed scheme can reduce the dead zone rate to less than half of the normal system.

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圆极化二维波束扫描R/W天线提高920MHz RFID系统读取速率

射频识别(RFID)是一种很有前途的物联网(IoT)解决方案，它带来了供应链管理的创新。然而，RFID在多径无线电传播环境下存在读取可靠性问题。为了提高系统的可靠性，提出了一种带移动导体的读写波束调制方案。通过调制天线波束，可以改变天线的多径传播结构，使驻波引起的零点发生位移。因此，通过重复传输和选择组合相结合，可以提高读取成功率。在本文中，我们提出了一种新的二维波束扫描天线，用于圆极化操作，这是实际RFID系统所必需的。仿真结果表明，该方案可以改变典型储物架的电场分布。制作了一种偏心旋转圆形导体的电子束调制器样机并进行了测试。RFID读取测量结果表明，该方案可将死区率降低到正常系统的一半以下。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 Fourteenth International Conference on Ubiquitous and Future Networks (ICUFN)

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