Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial
The current distribution, input impedance, and radiation pattern of a cylindrical dipole antenna enclosed by a thin cylindrical shell of double negative (DNG) metamaterial are computed using the piecewise sinusoidal Galerkin formulation. In the presence of the DNG shell, the dipole antenna exhibits...
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| Format: | Article |
| Language: | English |
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Wiley
2007-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2007/97481 |
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| _version_ | 1832562028907069440 |
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| author | Khan M. Z. Shams Mohammod Ali |
| author_facet | Khan M. Z. Shams Mohammod Ali |
| author_sort | Khan M. Z. Shams |
| collection | DOAJ |
| description | The current distribution, input impedance, and radiation pattern of a cylindrical dipole antenna enclosed by a thin cylindrical shell of double negative (DNG) metamaterial are computed using the piecewise sinusoidal Galerkin formulation. In the presence of the DNG shell, the dipole antenna exhibits three interesting characteristics. The input impedance shows potentials for wide bandwidth due to the relative insensitivity of the impedance with frequency. Within specific ranges of DNG material parameter values, the dipole shows resonance at much lower frequencies than its resonant frequency in free space. The dipole does not show change in the direction of the principal beam nor does it show signs of beam splitting and side lobes even when the antenna length approaches one and a half wavelength. |
| format | Article |
| id | doaj-art-0e7c97be188545b2aab84573d8667fc2 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2007-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-0e7c97be188545b2aab84573d8667fc22025-02-03T01:23:28ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772007-01-01200710.1155/2007/9748197481Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) MetamaterialKhan M. Z. Shams0Mohammod Ali1Department of Electrical Engineering, University of South Carolina, Swearingen Engineering Center, SC 29208, ColombiaDepartment of Electrical Engineering, University of South Carolina, Swearingen Engineering Center, SC 29208, ColombiaThe current distribution, input impedance, and radiation pattern of a cylindrical dipole antenna enclosed by a thin cylindrical shell of double negative (DNG) metamaterial are computed using the piecewise sinusoidal Galerkin formulation. In the presence of the DNG shell, the dipole antenna exhibits three interesting characteristics. The input impedance shows potentials for wide bandwidth due to the relative insensitivity of the impedance with frequency. Within specific ranges of DNG material parameter values, the dipole shows resonance at much lower frequencies than its resonant frequency in free space. The dipole does not show change in the direction of the principal beam nor does it show signs of beam splitting and side lobes even when the antenna length approaches one and a half wavelength.http://dx.doi.org/10.1155/2007/97481 |
| spellingShingle | Khan M. Z. Shams Mohammod Ali Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial International Journal of Antennas and Propagation |
| title | Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial |
| title_full | Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial |
| title_fullStr | Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial |
| title_full_unstemmed | Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial |
| title_short | Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial |
| title_sort | analyses of a dipole antenna loaded by a cylindrical shell of double negative dng metamaterial |
| url | http://dx.doi.org/10.1155/2007/97481 |
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