Circular Slot-Based Microstrip Circularly Polarized Antenna for 2.45-GHz RFID Reader Applications

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of radio frequency identification Pub Date : 2024-01-16 DOI:10.1109/JRFID.2024.3354515

Amit Birwal;Kamlesh Patel;Sanjeev Singh

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Abstract

The paper presents a new design for a mobile 2.45-GHz passive Radio Frequency Identification (RFID) reader, featuring a compact, broadband, and circularly polarized antenna. The antenna proposed consists of two stacked square patches separated by an air gap for a wide-band impedance bandwidth. The antenna is printed on a double-sided 1.6 mm FR4 substrate with an overall dimension of

$65\times 65\times 11.27$

mm3. By introducing and optimizing a pair of symmetrical ring slots in both the square patches, a good Axial-Ratio Bandwidth (ARBW) and symmetrical broadside radiation patterns are achieved. The reader antenna shows a measured

$S_{11}$

bandwidth (S11<−10 dB) from (2.3–2.7 GHz) and ARBW (< 3 dB) from (2.39-2.48 GHz). The peak gain of the proposed antenna is 6.2 dBi and is obtained at the center frequency of 2.45 GHz. Measurements of the proposed antenna are discussed to obtain the read range and field of view, which confirms its suitability for RFID Reader Applications and other Internet of Things (IoT) based applications.

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用于 2.45 GHz RFID 阅读器应用的基于圆槽的微带圆极化天线

本文介绍了一种 2.45 GHz 移动式无源射频识别（RFID）读取器的新设计，该读取器采用紧凑、宽带和圆极化天线。所提出的天线由两个堆叠的方形贴片组成，中间用气隙隔开，以获得宽带阻抗带宽。天线印制在双面 1.6 毫米的 FR4 基板上，总尺寸为 65×65×11.27 元毫米3。通过在两个方形贴片上引入和优化一对对称环槽，实现了良好的轴向比带宽（ARBW）和对称的宽边辐射模式。读取器天线在（2.3-2.7 千兆赫）范围内显示了实测的 $S_{11}$ 带宽（S11<-10 dB），在（2.39-2.48 千兆赫）范围内显示了 ARBW（< 3 dB）。拟议天线的峰值增益为 6.2 dBi，中心频率为 2.45 GHz。对拟议天线的测量结果进行了讨论，以获得读取范围和视场角，从而证实其适用于 RFID 阅读器应用和其他基于物联网（IoT）的应用。

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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