Time reversal is a well-known method to focus a wave-field into complex unknown/known media. In this letter, we show that when applying time reversal to vector fields, a proper choice of the test source's polarization allows definite advantages as compared to the usual approach of using an a priori fixed polarization. As a matter of fact, by so doing, one can not only focus the target point, but also obtain a field distribution that better accommodates some other requirements (e.g., minimizes sidelobe level). To exploit this possibility, we propose a simple and effective optimization strategy and assess it in case of focusing transverse electric (TE) fields into 2-D scenarios.

On the role and choice of source polarization in time reversal focusing of vector fields / Iero, D. A. M.; Crocco, L.; Isernia, Tommaso. - In: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS. - ISSN 1536-1225. - 15:(2016), pp. 214-217. [10.1109/LAWP.2015.2438539]

On the role and choice of source polarization in time reversal focusing of vector fields

ISERNIA, Tommaso
2016-01-01

Abstract

Time reversal is a well-known method to focus a wave-field into complex unknown/known media. In this letter, we show that when applying time reversal to vector fields, a proper choice of the test source's polarization allows definite advantages as compared to the usual approach of using an a priori fixed polarization. As a matter of fact, by so doing, one can not only focus the target point, but also obtain a field distribution that better accommodates some other requirements (e.g., minimizes sidelobe level). To exploit this possibility, we propose a simple and effective optimization strategy and assess it in case of focusing transverse electric (TE) fields into 2-D scenarios.
2016
Focusing, Electromagnetics, Arrays, Transmission line measurements, Optimization, Sensors, Magnetic domains
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/6280
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