Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2014.25.1.25

Design of a Modified Alford Loop Antenna for On-Body Devices  

Park, Joongki (Department of Electronic & Computer Engineering, Hanyang University)
Lee, Juneseok (Department of Electronic & Computer Engineering, Hanyang University)
Choi, Jaehoon (Department of Electronic & Computer Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.1, 2014 , pp. 25-31 More about this Journal
Abstract
In this paper, a modified Alford loop antenna for on-body communication system is proposed. The proposed antenna operating in the ISM band is designed with consideration of human body effect. One of advantages of the Alford loop antenna structure is low-profile, however the Alford loop antenna is not suitable for on-body devices since it does not have a ground plane for other electronic part of on-body system and requires balanced feeding structure. To be embedded on on-body devices, the proposed antenna is design with the unbalanced feed structure and ground. The performance of the proposed antenna is simulated and measured when it is placed on the human body phantom to consider the effect of the human body. The proposed antenna a 10 dB return loss bandwidth over the ISM band and monopole-like radiation pattern with low-profile. The antenna has the surface of appropriate for on-body communication environment.
Keywords
On-Body; Modified Alford Loop Antenna; Surface Wave; Low-Profile;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 P. S. Hall, Y. Hao, Antennas and Propagation for Bodycentric Wireless Communications, Artech House, Norwood, pp. 1-64, 2006.
2 A. Alford, A. G. Kandoian, "Ultra-high frequency loop antenna", Trans. on AIEE, vol. 59, pp. 843-848, 1940.
3 H. R. Chuang, "Omni-directional horizontally polarized Alford loop strip antenna", US Patent 5767809, Jun. 16, 1998.
4 W. L. Stutzman, G. A. Thiele, Antenna Theory and Design, John Wiley & Sons, pp. 59-66, 1998.
5 G. A. Conway, W. G. Scanlon, "Antennas for over-bodysurface communication at 2.45 GHz", IEEE Trans. on Antennas and Propagation, vol. 57, pp. 844-855, Apr. 2009.   DOI   ScienceOn
6 S. Zhu, R. Langley, "Dual-band wearable textile antenna on an EBG substrate", IEEE Trans. on Antennas and Propagation, vol. 57, pp. 926-935, Apr. 2009.   DOI   ScienceOn
7 J. Liu, Q. Xue, H. Wong, H. Lai, and Y. Long, "Design and analysis of a low-profile and broadband microstrip monopolar patch antenna", IEEE Trans. Antennas Propag., vol. 61, no. 1, pp. 11-18, Jan. 2013.   DOI   ScienceOn
8 C. H. Ahn, S. W. Oh, and Kai Chang, "A dual-frequency omnidirectional antenna for polarization diversity of MIMO and wireless communication applications", IEEE Antennas and Wireless Propaga. Lett., vol. 8. pp. 966-969, 2009.
9 C. C. Lin, L. C. Kuo, and H. R. Chuang, "A horizontally polarized omnidirecional printed antenna for WLAN applications", IEEE Trans. Antennas Propag., vol. 54, no. 11, pp. 3551-3556, Nov. 2006.   DOI
10 D. L. Means, W. Kwok, "Evaluating compliance with FCC guidelines for human exposure to radio-frequency electromagnetic fields, federal communications commission office of engineering & technology", Supplement C(edition 01-01) to OET Bulletin 65(Edition 97-01), Jun. 2001.
11 HFSS: High Frequency Structure Simulator Based on the Finite Element Method, v.14.0.0, ANSYS Inc.
12 이순용, 서원범, 권결, 최재훈, "MICS 대역과 ISM 대역에서 인체 전기적 상수를 갖는 준(準)고체형 플랫팬텀 제작", 한국전자파학회논문지, 23(1), pp. 101-107, 2012년 1월.