A hybrid effective approach is proposed to focus the intensity of a vector field generated by an arbitrary fixed-geometry array antenna into a target point and keep it bounded elsewhere. To overcome the complexity of the underlying non-convex problem involving a possibly large number of unknowns, we show how the space of possible polarizations can be regarded as a 5-sphere and introduce a nested procedure which jointly relies on an (external) global optimization of the field polarization on the target point plus an (internal) convex optimization of the array excitations. The approach can deal with both the cases of near-field (NF) and far-field (FF) focusing as well as with complex inhomogeneous 3-D media. The high-performance results achieved through full-wave simulations of realistic scenarios confirm the actual feasibility of tackling the problem as a low-dimensional global optimization, so that the best possible focusing can be hopefully realized.

Constrained focusing of vector fields intensity in near zone and/or complex scenarios as a low-dimensional global optimization / Battaglia, G. M.; Morabito, A. F.; Palmeri, R.; Isernia, T.. - In: JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS. - ISSN 0920-5071. - 34:15(2020), pp. 1977-1989. [10.1080/09205071.2020.1801521]

Constrained focusing of vector fields intensity in near zone and/or complex scenarios as a low-dimensional global optimization

Battaglia G. M.;Morabito A. F.;Palmeri R.
;
Isernia T.
2020-01-01

Abstract

A hybrid effective approach is proposed to focus the intensity of a vector field generated by an arbitrary fixed-geometry array antenna into a target point and keep it bounded elsewhere. To overcome the complexity of the underlying non-convex problem involving a possibly large number of unknowns, we show how the space of possible polarizations can be regarded as a 5-sphere and introduce a nested procedure which jointly relies on an (external) global optimization of the field polarization on the target point plus an (internal) convex optimization of the array excitations. The approach can deal with both the cases of near-field (NF) and far-field (FF) focusing as well as with complex inhomogeneous 3-D media. The high-performance results achieved through full-wave simulations of realistic scenarios confirm the actual feasibility of tackling the problem as a low-dimensional global optimization, so that the best possible focusing can be hopefully realized.
2020
Array synthesis
convex programming
electromagnetic focusing
hybrid optimization
File in questo prodotto:
File Dimensione Formato  
MORABITO_2020_JEMWA_CONSTRAINED_EDITOR.pdf

non disponibili

Descrizione: versione editoriale - SOLO GESTORI ARCHIVIO
Tipologia: Versione Editoriale (PDF)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.33 MB
Formato Adobe PDF
2.33 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
MORABITO_2020_JEMWA_CONSTRAINED_POST.pdf

Open Access dal 13/08/2021

Descrizione: POST PRINT DELL’AUTORE
Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 3.79 MB
Formato Adobe PDF
3.79 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/74201
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 6
social impact