Abstract
The scattering of a far-field source by perfectly conducting targets above a semi-infinite lossy medium is studied. An analytical solution is applied to the electromagnetic scattering problem with the Cylindrical Wave Approach. Interaction of a plane-wave field with the cylindrical targets is expressed through expansions into cylindrical waves, and a spectral approach is used to deal with the interaction of the scattered field and the interface. The method allows modelling the interaction of an external source with a biological medium, in the presence of external metallic objects. In the numerical examples, the electrical parameters of a muscle are used to model the biological tissue. Application to cases of interest for the total field transmitted in the muscle is investigated for both TM and TE polarization states. Penetration of the electromagnetic field is evaluated, both at the ISM frequency of 2.4 GHz and in the millimeter frequency range at 28 GHz.
Highlights
E MERGING research in the field of implantable antennas for continuous wireless health control of patients is motivated by promising advantages in terms of social and economic impact [1]–[3]
NUMERICAL RESULTS The Cylindrical Wave Approach (CWA) presented in Section II has been numerically implemented in a MATLAB code
The application of the problem presented in Section II to the case of metallic targets below a biological medium is considered
Summary
E MERGING research in the field of implantable antennas for continuous wireless health control of patients is motivated by promising advantages in terms of social and economic impact [1]–[3]. They are placed in a background of two semi-infinite media, the one above filled with air, and containing both the cylinders and the plane-wave used as source of the scattering problem, and the lowest one filled by a dielectric medium with lossy dielectric permittivity, in order to model a biological tissue.
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