Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 64, Issue 12, Pages 4984-4992Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2016.2621027
Keywords
Active implant; encapsulated antenna; Green's function; nonspherical body; specific absorption rate (SAR)
Funding
- University of Paris-Est Marne-La-Vallee
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Radiation from an encapsulated Hertz dipole, eccentrically implanted in a layered spherical body, is determined by use of the dyadic Green's function (dGf) theory. The body, a model of the human torso, comprises skin and fat layers around a homogeneous tissue core. The capsule is a spherical cavity bounded by an insulating layer. The dGf of this radiation problem involves two reference points, the center of the body and the center of the capsule. The analysis results in a concise formulation of the dGf and of the main radiation quantities. Numerical results are shown for the radiated power, efficiency, and directive gain of the Hertz dipole versus the capsule displacement from the center of the body. Specific absorption rate (SAR) maps are drawn on two cross sections of the body in search of the entire distribution of SAR and the location of peak SAR.
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