A Compact Slot-Based Bi-Directional UHF RFID Reader Antenna for Far-Field Applications

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of radio frequency identification Pub Date : 2024-09-10 DOI:10.1109/JRFID.2024.3457691

Amit Birwal;Akash Shakya;Saurav;Shalini Kashyap;Kamlesh Patel

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Abstract

This research introduces a novel circularly polarized compact antenna designed for universal ultrahigh-frequency (UHF) radio-frequency identification (RFID) handheld readers for Bi-directional RFID Far-field Applications. The antenna features a microstrip feed positioned at the center opposite a slot-based square ground. The ground plane is perturbed to include a thin horizontal and vertical stub on the left side, along with a thick rectangular slot at the right side of the square ground plane to achieve circular polarization. The simulated antenna provides a 3-dB axial ratio bandwidth (ARBW) of 42 MHz (831–873 MHz), a 10 dB impedance bandwidth of 15% (814–945 MHz), and a peak gain of 5.0 dBi. The antenna is fabricated on both layers of an affordable FR4 substrate, measuring

$81\times 81\times 1.6~{\mathrm { mm}}^{3}$

and its measurement results are in close agreement with simulated. The application of this antenna is made with a commercial UHF RFID reader module. The obtained read range and field of view confirm that this proposed antenna is a promising option for compact universal UHF RFID handheld reader applications and other Internet of Things (IoT) based applications.

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用于远场应用的紧凑型槽式双向 UHF RFID 阅读器天线

本研究介绍了一种新型圆极化紧凑型天线，该天线专为通用超高频（UHF）射频识别（RFID）手持阅读器设计，适用于双向射频识别远场应用。该天线的特点是微带馈线位于中心位置，与基于插槽的方形接地相对。为了实现圆极化，对地平面进行了扰动，在左侧增加了一个水平和垂直的细桩，并在正方形地平面的右侧增加了一个厚矩形槽。模拟天线的 3 dB 轴向比带宽（ARBW）为 42 MHz（831-873 MHz），10 dB 阻抗带宽为 15%（814-945 MHz），峰值增益为 5.0 dBi。该天线在经济实惠的 FR4 基板的两层上制作，尺寸为 81×81×1.6~{\mathrm { mm}}^{3}$，测量结果与模拟结果非常接近。该天线被应用于一个商用超高频射频识别（UHF RFID）阅读器模块。所获得的读取距离和视场角证实，所提出的天线对于紧凑型通用超高频射频识别（UHF RFID）手持式读写器应用和其他基于物联网（IoT）的应用来说是一个很有前途的选择。

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

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0.00%

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