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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Skigin, D.C., Veremey, V.V., Mittra, R.
Formato: JOUR
Lenguaje:English
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: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 todo:paper_0018926X_v47_n2_p376_Skigin
record_format dspace
spelling todo:paper_0018926X_v47_n2_p376_Skigin2023-10-03T14:16:17Z Superdirective radiation from finite gratings of rectangular grooves Skigin, D.C. Veremey, V.V. Mittra, R. 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. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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)
language English
orig_language_str_mv English
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, D.C.
Veremey, V.V.
Mittra, R.
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.
format JOUR
author Skigin, D.C.
Veremey, V.V.
Mittra, R.
author_facet Skigin, D.C.
Veremey, V.V.
Mittra, R.
author_sort Skigin, D.C.
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
url http://hdl.handle.net/20.500.12110/paper_0018926X_v47_n2_p376_Skigin
work_keys_str_mv AT skigindc superdirectiveradiationfromfinitegratingsofrectangulargrooves
AT veremeyvv superdirectiveradiationfromfinitegratingsofrectangulargrooves
AT mittrar superdirectiveradiationfromfinitegratingsofrectangulargrooves
_version_ 1807316750145945600

Ejemplares similares