Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications
The spectral smoothness properties of the low-frequency array of the square kilometer array (SKA), namely, SKA-Low, are an important issue for its scientific objectives to be attainable. A large array of 256 log-periodic dipole antennas, installed on top of a 42 m circular ground plane, will work as...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2024/1399941 |
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| author | Georgios Kyriakou Pietro Bolli Mirko Bercigli |
| author_facet | Georgios Kyriakou Pietro Bolli Mirko Bercigli |
| author_sort | Georgios Kyriakou |
| collection | DOAJ |
| description | The spectral smoothness properties of the low-frequency array of the square kilometer array (SKA), namely, SKA-Low, are an important issue for its scientific objectives to be attainable. A large array of 256 log-periodic dipole antennas, installed on top of a 42 m circular ground plane, will work as an SKA-Low station in the frequency range of 50–350 MHz. In this article, the ground plane-induced effects are examined in terms of antenna beam spectral characteristics, while different antenna placements are considered. Results are produced both at the isolated antenna and at the array level in the band 50–100 MHz, by employing an approximate method for the speeding-up of array simulations. We attempt to distinguish the ground plane effect from that of mutual coupling among antennas, which appears to be more severe at specific frequencies, using 2 figures of merit. The discrete Fourier transform (DFT) components of gain pattern ratios identify the fundamental spatial components of the ripple, while the envelope correlation coefficient quantifies the penalty to considering an infinite ground plane. |
| format | Article |
| id | doaj-art-cc5a289232644f6599eaee47fe47592b |
| institution | DOAJ |
| issn | 1687-5877 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-cc5a289232644f6599eaee47fe47592b2025-08-20T03:19:32ZengWileyInternational Journal of Antennas and Propagation1687-58772024-01-01202410.1155/2024/1399941Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical ApplicationsGeorgios Kyriakou0Pietro Bolli1Mirko Bercigli2INAF-Arcetri Astrophysical ObservatoryINAF-Arcetri Astrophysical ObservatoryIngegneria Dei SistemiThe spectral smoothness properties of the low-frequency array of the square kilometer array (SKA), namely, SKA-Low, are an important issue for its scientific objectives to be attainable. A large array of 256 log-periodic dipole antennas, installed on top of a 42 m circular ground plane, will work as an SKA-Low station in the frequency range of 50–350 MHz. In this article, the ground plane-induced effects are examined in terms of antenna beam spectral characteristics, while different antenna placements are considered. Results are produced both at the isolated antenna and at the array level in the band 50–100 MHz, by employing an approximate method for the speeding-up of array simulations. We attempt to distinguish the ground plane effect from that of mutual coupling among antennas, which appears to be more severe at specific frequencies, using 2 figures of merit. The discrete Fourier transform (DFT) components of gain pattern ratios identify the fundamental spatial components of the ripple, while the envelope correlation coefficient quantifies the penalty to considering an infinite ground plane.http://dx.doi.org/10.1155/2024/1399941 |
| spellingShingle | Georgios Kyriakou Pietro Bolli Mirko Bercigli Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications International Journal of Antennas and Propagation |
| title | Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications |
| title_full | Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications |
| title_fullStr | Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications |
| title_full_unstemmed | Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications |
| title_short | Spectral Smoothness of Ground Plane Backed Log-Periodic Dipole Antennas for Radioastronomical Applications |
| title_sort | spectral smoothness of ground plane backed log periodic dipole antennas for radioastronomical applications |
| url | http://dx.doi.org/10.1155/2024/1399941 |
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