A multipolar analysis of near-field absorption and scattering processes

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Date
2013Version
Acceso abierto / Sarbide irekia
Type
Artículo / Artikulua
Version
Versión aceptada / Onetsi den bertsioa
Impact
|
10.1109/TAP.2013.2272453
Abstract
A multipolar formulation is adopted to investigate
the absorption and scattering processes involved in near-field
interactions. This approach allows one to determine the upper
bounds for the absorbed and radiated powers that would be
achieved by an ideal lossless sensor, which are of particular
interest, for example, to wireless power transfer (WPT), wireless
sensors and near-field coupled radiat ...
[++]
A multipolar formulation is adopted to investigate
the absorption and scattering processes involved in near-field
interactions. This approach allows one to determine the upper
bounds for the absorbed and radiated powers that would be
achieved by an ideal lossless sensor, which are of particular
interest, for example, to wireless power transfer (WPT), wireless
sensors and near-field coupled radiators. The multipolar formulation
also helps to extricate the fundamental compromises
that must be addressed in the design of such systems, as
well as to identify strategies that could approach their best
possible performances. The general theory is illustrated with an
example consisting of a coated sensor illuminated by a Hertzian
dipole, which is a representative example of any scattering
or radiating system based on small resonators. The example
also serves to compare the performance characteristics obtained
with different phenomena such as multipolar resonances, phaseinduced
interference effects and cloaking. [--]
Subject
Absorption,
Near-field interactions,
Near-field parasitic resonators,
Scattering,
Sensors,
Wireless power transfer
Publisher
IEEE
Published in
IEEE Transactions on Antennas and Propagation, vol. 61, no. 10, October 2013
Departament
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Publisher version
Sponsorship
This work was supported in part by the Spanish Ministry of Science and
Innovation, Direcci´on General de Investigaci´on y Gesti´on del Plan Nacional
de I+D+I, Subdirecci´on General de Proyectos de Investigaci´on, Project Nos.
TEC2009-11995 and CSD2008-00066 and by NSF contract number ECCS-
1126572.