Gridded Vivaldi Antenna Feed System for the Northern Cross Radio Telescope
The design of a broadband antenna feed system for the cylindrical offset parabolic reflector of the Italian Northern Cross radio telescope is described. Its operative frequency band spans from the Low Frequency Array (LOFAR) upper band, i.e. 120-240 MHz, to the present telescope operative band cente...
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| Veröffentlicht in: | IEEE transactions on antennas and propagation 2011-06, Vol.59 (6), p.1963-1971 |
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| container_end_page | 1971 |
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| container_issue | 6 |
| container_start_page | 1963 |
| container_title | IEEE transactions on antennas and propagation |
| container_volume | 59 |
| creator | Virone, G Sarkis, R Craeye, C Addamo, G Peverini, O A |
| description | The design of a broadband antenna feed system for the cylindrical offset parabolic reflector of the Italian Northern Cross radio telescope is described. Its operative frequency band spans from the Low Frequency Array (LOFAR) upper band, i.e. 120-240 MHz, to the present telescope operative band centered at 408 MHz. The proposed configuration consists of a linear array of gridded Vivaldi (tapered slot) radiators inside a wired subreflector. Numerical simulations have been carried out using both commercial software and a specialized Method-of-Moments approach. They show that the designed feed system provides both a good impedance matching and an efficient illumination of the main reflector in the overall frequency band. |
| doi_str_mv | 10.1109/TAP.2011.2122227 |
| format | Article |
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Its operative frequency band spans from the Low Frequency Array (LOFAR) upper band, i.e. 120-240 MHz, to the present telescope operative band centered at 408 MHz. The proposed configuration consists of a linear array of gridded Vivaldi (tapered slot) radiators inside a wired subreflector. Numerical simulations have been carried out using both commercial software and a specialized Method-of-Moments approach. 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Its operative frequency band spans from the Low Frequency Array (LOFAR) upper band, i.e. 120-240 MHz, to the present telescope operative band centered at 408 MHz. The proposed configuration consists of a linear array of gridded Vivaldi (tapered slot) radiators inside a wired subreflector. Numerical simulations have been carried out using both commercial software and a specialized Method-of-Moments approach. They show that the designed feed system provides both a good impedance matching and an efficient illumination of the main reflector in the overall frequency band.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TAP.2011.2122227</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 0018-926X |
| ispartof | IEEE transactions on antennas and propagation, 2011-06, Vol.59 (6), p.1963-1971 |
| issn | 0018-926X 1558-2221 |
| language | eng |
| recordid | cdi_ieee_primary_5722996 |
| source | IEEE Electronic Library (IEL) |
| subjects | Antenna arrays Antenna feeds Antenna radiation patterns Arrays Broadband Computer programs Feeds Finite element methods Frequency bands Illumination Mathematical models Moment methods Radio astronomy Radio telescopes Reflection reflector antennas square kilometer array (SKA) |
| title | Gridded Vivaldi Antenna Feed System for the Northern Cross Radio Telescope |
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