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International Journal of Antennas and Propagation
Volume 2011, Article ID 919821, 6 pages
Research Article

Embedded Spiral Microstrip Implantable Antenna

1Department of Electrical Engineering, University of Mississippi, Oxford, MS 38677, USA
2Department of Electrical and Computer Engineering, Concordia University, Montreal, QC, Canada H3G 1M8

Received 14 February 2011; Accepted 4 May 2011

Academic Editor: Shyh-Kang Jeng

Copyright © 2011 Wei Huang and Ahmed A. Kishk. 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.


A miniaturized embedded spiral-shaped microstrip antenna simulated within a block of 2/3 human muscle phantom is designed for implanted cardiac pacemaker. The new design not only achieves the good matching at the required 403 MHz but also obtains 57% size reduction over the existing design. The reflection coefficients are measured in both free space and in the human-tissue-equivalent dielectric liquid. Good agreement is achieved between simulated results and the experimental results.