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Design of multi-layered polygonal helix antennas for RFID applications

✍ Scribed by Jaeyul Choo; Hosung Choo; Ikmo Park; Yisok Oh

Book ID
102516795
Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
227 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this letter, we propose a novel printed helix antenna for an RFID reader in the UHF band. The printed microstrip line of the antenna is first wound outside a polygonal‐shaped layer and then wound on an inner layer to control the overall gain and the radiation pattern of the antenna. On each layer, the winding pitch angles can have either negative or positive values, which results in a circularly polarized (CP) broad bandwidth. The structural details of the antenna were optimized using the Pareto genetic algorithm (GA), which allowed for excellent performance with the use of RFID reader antennas. The optimized two‐layered polygonal helix was fabricated on a flexible cardboard substrate. Performances of the antenna were measured and compared with those of simulations. Β© 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1971–1974, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22595

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