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Printed symmetric inverted-F antenna with a quasi-isotropic radiation pattern

✍ Scribed by Chihyun Cho; Hosung Choo; Ikmo Park

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
539 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article presents a tag antenna with a quasi‐isotropic radiation pattern operating in the UHF band to eliminate the shadow zone in RFID systems. The proposed tag antenna has a symmetric inverted‐F structure with a bent section and is printed on a 50 μm‐thick PET substrate for easy and low‐cost fabrication. The detailed design parameters of the antenna were optimized using a Pareto genetic algorithm in conjunction with the IE3D EM simulator. The optimized antenna shows 3.2% fractional bandwidth for S~11~ < −10 dB, more than 87% efficiency in the operating frequency band, and less than 6 dB gain deviation. The measured reading range between the tag and reader is between 1.4 and 2.2 m. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 927–930, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23247

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