Three Dual-Band and Dual-Linearly Polarized Antenna Configurations for UHF-RFID and WLAN Applications

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE journal of radio frequency identification Pub Date : 2024-06-04 DOI:10.1109/JRFID.2024.3409362

Sayan Sarkar

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引用次数: 0

Abstract

This paper presents three dual-band, dual-linearly polarized antenna configurations for UHF-RFID and WLAN applications. The first configuration consists of a square patch with outer ring which exhibits two resonances at 865MHz and 2.45GHz respectively. At both these frequencies, the antenna has its main beam along the +z axis (broadside direction). Two superstrates, S3 and S4, are designed to be used separately with this antenna. Both S3 and S4, when placed above the antenna separately, shift the first resonance from 865MHz to 905MHz without affecting the 2.45GHz resonance. Placing S3 5mm above the antenna gives rise to a bi-directional radiation pattern (±z-axis) while replacing S3 with S4 generates a main beam along the -z axis (opposite broadside direction) at 905MHz. The radiation pattern remains unperturbed at 2.45GHz for both configurations. The first antenna configuration works within the European UHF-RFID band whereas the antenna + S3 and antenna + S4 configurations work within the North-American UHF-RFID band. Additionally, all three configurations also operate within the 2.45GHz WLAN band. Both the antenna-superstrate configurations have very low profiles of

$\lambda _{0}$

$24.4~(\lambda _{0} \,\, {=}$

free space wavelength at 2.45GHz). The antenna can thus be used with/without the superstrates as an RFID reader depending upon requirements. The information received from the tags can then be transmitted via the WLAN channel.

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用于 UHF-RFID 和 WLAN 应用的三种双频双线性极化天线配置

本文介绍了三种用于 UHF-RFID 和 WLAN 应用的双频双线性极化天线配置。第一种配置由一个带外环的方形贴片组成，分别在 865MHz 和 2.45GHz 频率上表现出两个谐振。在这两个频率上，天线的主波束都沿着 +z 轴（宽边方向）。S3 和 S4 这两个叠层可分别与该天线配合使用。将 S3 和 S4 分别置于天线上方时，可将第一谐振频率从 865MHz 移至 905MHz，而不影响 2.45GHz 谐振。将 S3 放在天线上方 5 毫米处会产生双向辐射模式（±z 轴），而将 S3 换成 S4 则会在 905MHz 处产生沿 -z 轴（相反的宽边方向）的主波束。两种配置在 2.45GHz 时的辐射模式均保持不变。第一种天线配置在欧洲 UHF-RFID 频段内工作，而天线 + S3 和天线 + S4 配置在北美 UHF-RFID 频段内工作。此外，这三种配置还可在 2.45GHz WLAN 频段内工作。这两种天线-基板配置都具有非常低的剖面，为$\lambda _{0}$ / $24.4~（2.45GHz 时的\lambda _{0} \,\,{=}$自由空间波长）。因此，根据需要，天线可以在有或没有叠层的情况下用作 RFID 阅读器。然后就可以通过无线局域网信道传输从标签接收到的信息。

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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来源期刊

IEEE journal of radio frequency identification

CiteScore

5.70

自引率

0.00%

发文量