Superdirective radiation from finite gratings of rectangular grooves

In this paper, the superdirective property of arrays comprising a finite number of rectangular grooves is studied by using the modal approach, which is a simple but powerful technique for analyzing these gratings. Numerical results show that when a specific characteristic mode of the structure refer...

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Detalles Bibliográficos
Autor principal:	Skigin, Diana Carina
Publicado:	1999
Materias:	Algorithms Antenna radiation Directional patterns (antenna) Electromagnetic wave scattering Frequency response Modal analysis Natural frequencies Parameter estimation Resonance Gratings Model based parameter estimation Superdirectivity Antenna arraysPB - IEEECP - Piscataway, NJ, United States
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018926X_v47_n2_p376_Skigin http://hdl.handle.net/20.500.12110/paper_0018926X_v47_n2_p376_Skigin
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_0018926X_v47_n2_p376_Skigin
record_format	dspace
spelling	paper:paper_0018926X_v47_n2_p376_Skigin2023-06-08T14:40:04Z Superdirective radiation from finite gratings of rectangular grooves Skigin, Diana Carina Algorithms Antenna radiation Directional patterns (antenna) Electromagnetic wave scattering Frequency response Modal analysis Natural frequencies Parameter estimation Resonance Gratings Model based parameter estimation Superdirectivity Antenna arraysPB - IEEECP - Piscataway, NJ, United States In this paper, the superdirective property of arrays comprising a finite number of rectangular grooves is studied by using the modal approach, which is a simple but powerful technique for analyzing these gratings. Numerical results show that when a specific characteristic mode of the structure referred to as the π mode is excited, the intensity of the field scattered in the specular direction exhibits a maximum, which becomes sharper and narrower as the number of grooves is increased. The far-field patterns exhibit superdirectivity at these resonant frequencies as evidenced by their beamwidths that are narrower than those expected from apertures of comparable size. The model-based parameter estimation (MBPE) technique has been employed to help locate extremely narrow resonances that are characteristic of superdirective arrays and its usefulness has been demonstrated. Fil:Skigin, D.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018926X_v47_n2_p376_Skigin http://hdl.handle.net/20.500.12110/paper_0018926X_v47_n2_p376_Skigin
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Algorithms Antenna radiation Directional patterns (antenna) Electromagnetic wave scattering Frequency response Modal analysis Natural frequencies Parameter estimation Resonance Gratings Model based parameter estimation Superdirectivity Antenna arraysPB - IEEECP - Piscataway, NJ, United States
spellingShingle	Algorithms Antenna radiation Directional patterns (antenna) Electromagnetic wave scattering Frequency response Modal analysis Natural frequencies Parameter estimation Resonance Gratings Model based parameter estimation Superdirectivity Antenna arraysPB - IEEECP - Piscataway, NJ, United States Skigin, Diana Carina Superdirective radiation from finite gratings of rectangular grooves
topic_facet	Algorithms Antenna radiation Directional patterns (antenna) Electromagnetic wave scattering Frequency response Modal analysis Natural frequencies Parameter estimation Resonance Gratings Model based parameter estimation Superdirectivity Antenna arraysPB - IEEECP - Piscataway, NJ, United States
description	In this paper, the superdirective property of arrays comprising a finite number of rectangular grooves is studied by using the modal approach, which is a simple but powerful technique for analyzing these gratings. Numerical results show that when a specific characteristic mode of the structure referred to as the π mode is excited, the intensity of the field scattered in the specular direction exhibits a maximum, which becomes sharper and narrower as the number of grooves is increased. The far-field patterns exhibit superdirectivity at these resonant frequencies as evidenced by their beamwidths that are narrower than those expected from apertures of comparable size. The model-based parameter estimation (MBPE) technique has been employed to help locate extremely narrow resonances that are characteristic of superdirective arrays and its usefulness has been demonstrated.
author	Skigin, Diana Carina
author_facet	Skigin, Diana Carina
author_sort	Skigin, Diana Carina
title	Superdirective radiation from finite gratings of rectangular grooves
title_short	Superdirective radiation from finite gratings of rectangular grooves
title_full	Superdirective radiation from finite gratings of rectangular grooves
title_fullStr	Superdirective radiation from finite gratings of rectangular grooves
title_full_unstemmed	Superdirective radiation from finite gratings of rectangular grooves
title_sort	superdirective radiation from finite gratings of rectangular grooves
publishDate	1999
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018926X_v47_n2_p376_Skigin http://hdl.handle.net/20.500.12110/paper_0018926X_v47_n2_p376_Skigin
work_keys_str_mv	AT skigindianacarina superdirectiveradiationfromfinitegratingsofrectangulargrooves
_version_	1768542441439232000

Superdirective radiation from finite gratings of rectangular grooves

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