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International Journal of Antennas and Propagation
Volume 2014, Article ID 952746, 7 pages
Research Article

Broadband Loop Antenna on Soft Contact Lens for Wireless Ocular Physiological Monitoring

1Department of Electrical Engineering, National Cheng Kung University, Tainan City 701, Taiwan
2Department of Electronic Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, Taiwan
3Department of Electronic and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
4Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, 804, Taiwan

Received 28 September 2013; Revised 9 March 2014; Accepted 9 March 2014; Published 13 April 2014

Academic Editor: Zhongxiang Shen

Copyright © 2014 Ssu-Han Ting 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.


This paper presents a novel loop antenna with broadband for wireless ocular physiological monitoring (WOPM). The antenna is fabricated on a thin-film poly-para-xylylene C (parylene C) substrate with a small thickness of 11 μm and dimension of  mm2. With the advantage of small size, the proposed antenna is suitable to apply to the soft contact lens and transmit the signal in microelectromechanical Systems (MEMS). Because the pig's eye and human's eye have similar parameters of conductivity and permittivity, the experimental results are obtained by applying the proposed antenna on the pig's eye and cover from 1.54 to 6 GHz for ISM band (2.4 and 5.8 GHz) applications. The measured antenna radiation patterns, antenna gains, and radiation efficiency will be demonstrated in this paper, which are suitable for application of wireless ocular physiological monitoring.