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International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 187029, 6 pages
http://dx.doi.org/10.1155/2014/187029
Research Article

Enhanced Loop Structure of NFC Antenna for Mobile Handset Applications

1Department of Wireless Communications Engineering, Kwangwoon University, No. 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea
2Defence R&D Center, Hanwha Corporation, 52-1 Woisam-Dong, Yuseong-Gu, Daejeon 305-156, Republic of Korea
3Department of Electronic Engineering, Kwangwoon University, No. 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea

Received 27 November 2013; Accepted 20 February 2014; Published 8 April 2014

Academic Editor: Yuan Yao

Copyright © 2014 Byungje Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A new structure of an NFC loop antenna for mobile handset applications is proposed. The proposed antenna consists of conventional loop elements and a parasitic loop embedded capacitor to enhance its performance. Although the sintered ferrite sheets with higher relative permeability have been used to reduce the performance deterioration due to the eddy current on the battery pack of a mobile handset, their costs are high, and they are considerably breakable. In this paper, with the proposed structure, we effectively enhance the performance of an NFC loop antenna by employing the ferrite-polymer composite with lower relative permeability .