Optimal Radiation of Body-Implanted Capsules

Abstract : Autonomous implantable bioelectronics requires efficient radiating structures for data transfer and wireless powering. The radiation of body-implanted capsules is investigated to obtain the explicit radiation optima for E- and B-coupled sources of arbitrary dimensions and properties. The analysis uses the conservation-of-energy formulation within dispersive homogeneous and stratified canonical body models. The results reveal that the fundamental bounds exceed by far the efficiencies currently obtained by conventional designs. Finally, a practical realization of the optimal source based on a dielectric-loaded cylindrical-patch structure is presented. The radiation efficiency of the structure closely approaches the theoretical bounds and shows a fivefold improvement over existing systems.
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Submitted on : Thursday, April 11, 2019 - 3:48:27 PM
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Denys Nikolayev, Wout Joseph, Maxim Zhadobov, Ronan Sauleau, Luc Martens. Optimal Radiation of Body-Implanted Capsules. Physical Review Letters, American Physical Society, 2019, 122 (10), pp.108101. ⟨10.1103/PhysRevLett.122.108101⟩. ⟨hal-02083882⟩

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