Superdirective radiation from finite groove gratings
The feasibility of generating superdirective radiation from antenna arrays comprising a finite number of active elements has been previously established in theoretical research, and has also been verified experimentally. In an earlier paper the authors have demonstrated that the scattered field of a...
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1998
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07803447_v4_n_p2174_Skigin http://hdl.handle.net/20.500.12110/paper_07803447_v4_n_p2174_Skigin |
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paper:paper_07803447_v4_n_p2174_Skigin |
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paper:paper_07803447_v4_n_p2174_Skigin2023-06-08T15:45:55Z Superdirective radiation from finite groove gratings Antenna arrays Electromagnetic fields Amplitude modulation Antenna arrays Electromagnetic wave polarization Electromagnetic wave scattering Phase modulation Conducting surfaces Corrugated structures High-Q resonances Rectangular groove Resonance frequencies Resonant elements Slotted cylinders Theoretical research Resonance Antenna radiation Finite groove gratings Q resonances Rayleigh coefficients Superdirective radiations The feasibility of generating superdirective radiation from antenna arrays comprising a finite number of active elements has been previously established in theoretical research, and has also been verified experimentally. In an earlier paper the authors have demonstrated that the scattered field of a structure formed by a finite array of coupled slotted cylinders exhibits superdirective characteristics at the resonance frequencies of the system. It is interesting to examine the question whether this property is a common attribute of scatterers formed by coupled resonant elements. This prompts us to investigate, in this paper, a corrugated structure formed by a finite array of rectangular grooves in a conducting surface. We find that the scattered field from such gratings also exhibits superdirective properties and that the superdirective scattering is associated with a high Q resonance that can only be excited in finite gratings. At these resonances, the magnitude of the electromagnetic field excited in the grooves is very high and the phase alternates between 0 and π. © 1998 IEEE. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07803447_v4_n_p2174_Skigin http://hdl.handle.net/20.500.12110/paper_07803447_v4_n_p2174_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 |
Antenna arrays Electromagnetic fields Amplitude modulation Antenna arrays Electromagnetic wave polarization Electromagnetic wave scattering Phase modulation Conducting surfaces Corrugated structures High-Q resonances Rectangular groove Resonance frequencies Resonant elements Slotted cylinders Theoretical research Resonance Antenna radiation Finite groove gratings Q resonances Rayleigh coefficients Superdirective radiations |
| spellingShingle |
Antenna arrays Electromagnetic fields Amplitude modulation Antenna arrays Electromagnetic wave polarization Electromagnetic wave scattering Phase modulation Conducting surfaces Corrugated structures High-Q resonances Rectangular groove Resonance frequencies Resonant elements Slotted cylinders Theoretical research Resonance Antenna radiation Finite groove gratings Q resonances Rayleigh coefficients Superdirective radiations Superdirective radiation from finite groove gratings |
| topic_facet |
Antenna arrays Electromagnetic fields Amplitude modulation Antenna arrays Electromagnetic wave polarization Electromagnetic wave scattering Phase modulation Conducting surfaces Corrugated structures High-Q resonances Rectangular groove Resonance frequencies Resonant elements Slotted cylinders Theoretical research Resonance Antenna radiation Finite groove gratings Q resonances Rayleigh coefficients Superdirective radiations |
| description |
The feasibility of generating superdirective radiation from antenna arrays comprising a finite number of active elements has been previously established in theoretical research, and has also been verified experimentally. In an earlier paper the authors have demonstrated that the scattered field of a structure formed by a finite array of coupled slotted cylinders exhibits superdirective characteristics at the resonance frequencies of the system. It is interesting to examine the question whether this property is a common attribute of scatterers formed by coupled resonant elements. This prompts us to investigate, in this paper, a corrugated structure formed by a finite array of rectangular grooves in a conducting surface. We find that the scattered field from such gratings also exhibits superdirective properties and that the superdirective scattering is associated with a high Q resonance that can only be excited in finite gratings. At these resonances, the magnitude of the electromagnetic field excited in the grooves is very high and the phase alternates between 0 and π. © 1998 IEEE. |
| title |
Superdirective radiation from finite groove gratings |
| title_short |
Superdirective radiation from finite groove gratings |
| title_full |
Superdirective radiation from finite groove gratings |
| title_fullStr |
Superdirective radiation from finite groove gratings |
| title_full_unstemmed |
Superdirective radiation from finite groove gratings |
| title_sort |
superdirective radiation from finite groove gratings |
| publishDate |
1998 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07803447_v4_n_p2174_Skigin http://hdl.handle.net/20.500.12110/paper_07803447_v4_n_p2174_Skigin |
| _version_ |
1768545193571647488 |