volume | PIER Journals

Abstract

The human body has got a pivotal role in portable devices operating in Body-centric Wireless Networks (BCWNs). Electromagnetic interaction between lossy human body tissues and wearable antennas degrades the system performance. Efficient deployment of such systems necessitates thorough understanding of these effects. Numerical analysis is a powerful tool that provides useful information of such scenarios fairly quicker than the actual measurements giving the user full control of the design environment. This paper investigates usefulness of numerical analysis based on the comparison of three different homogeneous models of the human body. Effectiveness of a numerical model is evaluated in terms of its resolution, computational efficiency, time consumption and accuracy of the results in software followed by experimental verifications.

1. Hall, P. S. and Y. Hao, Antennas and Propagation for Body-Centric Wireless Networks, 2nd Ed., Artech House Inc., London, 2012.

2. Chen, Z. N., Antennas for Portable Devices, John Wiley and Sons, Inc., UK, 2007.
doi:10.1002/9780470319642

3. Toftgard, J., S. Hornsleth, and J. B. Anderson, "Effects on portable antennas of the presence of a person," IEEE Transactions on Antennas and Propagation, Vol. 41, No. 6, 739-746, 1993.
doi:10.1109/8.250451

4. Jensen, M. A. and Y. Rahmat-Samii, "EM interaction of handset antennas and human in personal communications," IEEE Proceedings on Antennas and Propagation, Vol. 83, No. 1, 7-17, 1995.

5. Okoniewski, M. and M. A. Stuchly, "A study of the handset antenna and human body interaction," IEEE Transactions on Microwave Theory and Techniques, Vol. 44, No. 10, 1855-1864, 1996.
doi:10.1109/22.539944

6. Wang, Z., X. Chen, and C. G. Parini, "Effects of the ground and the human body on the performance of a handset antenna," IEE Proceedings on Microwave, Antenna and Propagation, Vol. 151, No. 2, 131-131, 2004.
doi:10.1049/ip-map:20040362

7. Chen, Z. N., A. Cai, T. S. P. See, X. Qing, and M. Y. W. Chia, "Small planar UWB antennas in proximity of the human head," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 4, 1846-1857, 1857.
doi:10.1109/TMTT.2006.872059

8. Conway, G. A., W. G. Scanlon, and D. Linton, "Low-profile microstrip patch antenna for over-body surface communication at 2.45GHz ," IEEE Vehicular Technology Conference, April 2007.

9. Drude, S., "Requirements and application scenarios for body area networks," Mobile and Wireless Communications Summit, 1-5, 2007.

10. Nagaoka, T., S. Watanabe, K. Sakurai, E. Kunieda, M. Taki, and Y. Yamanaka, "Development of realistic high-resolution whole-body voxel models of Japanese adult males and females of average height and weight, and application of models to radio-frequency electromagnetic-field dosimetry ," Physics in Medicine and Biology, Vol. 49, No. 4, 1-15, 2003.

11. Tell, R. A., "Microwave energy absorption in tissue," Twinbrook Research Laboratory Technical Report, 1972.

12. Weil, C. M., "Absorption characteristics of multilayered sphere models exposed to UHF/microwave radiation," IEEE Transactions on Biomedical Engineering, Vol. 22, No. 6, 468-476, 1975.
doi:10.1109/TBME.1975.324467

13. COST244 Working Group 3 "Proposal numerical canonical models in mobile communications," Proceedings of COST 244, 1-7, November 1994.

14. Nishizawa, S. and O. Hashimoto, "Effective shielding analysis for three layered human model," IEEE Transactions on Microwave Theory and Techniques, Vol. 47, No. 3, 277-283, 1999.
doi:10.1109/22.750223

15. Hao, Y., "Numerical and system modelling issues in body-centric wireless communications," The IET Seminar on Antennas and Propagation for Body-Centric Wireless Communications, April 2007.

16. Hombach, V., K. Meier, M. Burkhardt, E. Kuhn, and N. Kuster, "The dependence of EM energy absorption upon human head modelling at 900 MHz," IEEE Transactions on Microwave Theory and Techniques, Vol. 44, No. 10, 1865-1873, 1996.
doi:10.1109/22.539945

17. Holden, S. J., R. D. Sheridan, T. J. Coffey, R. A. Scaramuzza, and P. Diamantopoulos, "Electromagnetic modelling of current °ow in the heart from TASER devices and the risk of cardiac dysrhythmias ," Physics in Medicine and Biology, Vol. 52, 7193-7209, 2007.
doi:10.1088/0031-9155/52/24/001

18. Ur Rehman, M., Y. Gao, Z. Wang, J. Zhang, Y. Alfadhl, X. Chen, C. G. Parini, Z. Ying, T. Bolin, and J. W. Zweers, "Investigation of on-body bluetooth transmission," IET Proceedings Microwaves, Antennas and Propagation, Vol. 4, No. 7, 871-880, 2010.
doi:10.1049/iet-map.2008.0339

19. Gabriel, C., "Compilation of the dielectric properties of body tissues at RF and microwave frequencies," Brooks Air Force Technical Report, 1996.
doi:http://www.fcc.gov/oet/rfsafety/dielectric.html

20. CST Microwave Studio User Manual, 2013 .

21. FCC OET Bulletin 65 "Evaluating compliance with FCC guidelines for human exposure to radiofrequency electromagnetic fields ," FCC, August 1997.

22. "ICNIRP guidelines for limiting exposure to time-varying electric, magnetic and electromagnetic fields (up to 300 GHz),".
doi:http://www.icnirp.de/documents/emfgdl.pdf

Dr. Masood Ur-Rehman

Dr. Qammer Hussain Abbasi

Dr. Xiaodong Chen

Dr. Zhinong Ying