Planar near-field RFID reader antenna using opposite-directed currents

Chuyong Lee, Chihyun Cho, J. Ryoo, I. Park, H. Choo
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引用次数: 6

Abstract

In this paper we propose a novel planar near-field antenna for radio-frequency identification (RFID) based on the principle that two closely spaced opposite-directed currents (ODC) can generate a strong magnetic field over a broad surface area. To implement the ODC concept, the proposed antenna uses a dipole and a parasitic patch with a microstrip feedline. The proposed antenna provides an Hz field greater than −20 dBA/m in a region of 30 × 30 cm2. Measurements with a commercial RFID system show a maximum reading range of 24 cm, and a reading area of 744 cm2 for a reading range greater than 5 cm.
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使用反向电流的平面近场RFID阅读器天线
在本文中,我们提出了一种新型的平面近场天线,用于射频识别(RFID)基于两个紧密间隔的反向电流(ODC)可以在广阔的表面区域产生强磁场的原理。为了实现ODC概念,所提出的天线使用偶极子和带微带馈线的寄生贴片。该天线在30 × 30 cm2的范围内提供大于−20 dBA/m的Hz场。商用RFID系统的测量显示,最大读取范围为24厘米,读取面积为744平方厘米,读取范围大于5厘米。
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