Propagation of electromagnetic waves radiated by an implanted antenna

Influence of electromagnetic parameters of biological medium on the propagation of electromagnetic waves radiated by an antenna implanted in the human body is under consideration. The problem of refraction on the boundary between the biological medium and the free space is analytically solved taking into account the complex dielectric permittivity of the human body. Modeling the electromagnetic wave propagation through this boundary revealed a high attenuation of the wave radiated by an implanted antenna, which was experimentally observed. The considerable attenuation of the radiated waves is conditioned by the total internal reflection at the interface between the two dielectric layers and by the dielectric loss in the biological tissue. The proposed analytical model was confirmed by the full-wave simulation using SEMCAD X by SPEAG and the experimental validation.

[1]  R. Collin.  Foundations for microwave engineering , 1966 .

[2]  James C. Lin.  Electromagnetic Fields in Biological Systems , 2012 .

[3]  Sergei Zhgoon,et al.  Choice of quartz cut for sensitive wireless SAW temperature sensor , 2014, 2014 IEEE International Ultrasonics Symposium.

[4]  Yang Hao,et al.  Wireless body sensor networks for health-monitoring applications , 2008, Physiological measurement.

[5]  V. Plessky,et al.  Review on SAW RFID tags , 2009, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[6]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[7]  Sudhakar K. Rao,et al.  Miniature implantable and wearable on-body antennas: towards the new era of wireless body-centric systems [antenna applications corner] , 2014, IEEE Antennas and Propagation Magazine.