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A small RFID tag antenna using proximity-coupling to identify metallic objects

✍ Scribed by Wonkyu Choi; Jungsuk Kim; Ji-Hoon Bae; Gilyoung Choi

Book ID
102949231
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
771 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article presents the design of a small‐ and low‐profile radio frequency identification tag antenna in the UHF band that can be stuck to metallic objects. The designed tag antenna, which uses a ceramic material as an antenna substrate, consists of a radiating patch and microstrip lines for a proximity‐coupled feeding structure. Impedance matching can be simply obtained between the antenna and tag chip without any matching network using the antenna structure. The return‐loss bandwidth for S~11~ < 10 dB and radiation efficiency are about 9.5 MHz and 40% at 911 MHz, respectively. The read range is approximately from 3 to 3.5 m when the tag antenna is mounted on a metallic surface. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2978–2981, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23831

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Orthogonally proximity-coupled patch ant
Orthogonally proximity-coupled patch antenna for a passive RFID tag on metallic surfaces
✍ Hae-Won Son; Gil-Young Choi 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 105 KB

## Abstract A new wideband rectangular patch antenna for radio frequency identification tags mountable on metallic surfaces is presented. An orthogonally proximity‐coupled feed structure, in which the direction of the microstrip feedline is orthogonal to that of the resonant length of the radiating