Attenuation of electromagnetic waves radiated by an implanted antenna

摘要

Biological medium surrounding an implanted device is characterized by a high dielectric permittivity and a loss factor, resulting in a degradation of the electromagnetic signal. A high dielectric constant of the biological medium results in a strong wave reflection from the interface. The phenomenon of the total internal reflection at the interface between the biological tissue and the air is under consideration. The influence of additional matching layer on the wave propagation on the interface of biological tissue/free space is studied analytically and by using full wave simulation. Realization of a miniature dipole antenna with surface acoustic wave (SAW) resonator is suggested for wireless remote temperature monitoring. The proposed results are confirmed by the full-wave simulation using SEMCAD X by SPEAG and the experimental validation.