Candidate Wire Spiral Antennas for the SKA Radio Telescope
The SKA is a next generation radio telescope employing phased aperture arrays at its lowest operating band (SKA-low) of 70 - 450 MHz. SKA-low is a dual-polarized array consisting of antenna elements with stable impedance and low cross-polarization. We select the well-known broadband conical spiral a...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
| Published: |
IEEE
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/4982 |
| _version_ | 1848744667857813504 |
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| author | Jiwani, Aziz Padhi, Shantanu Waterson, Mark Hall, Peter Bij de Vaate, Jan Geralt |
| author2 | IEEE |
| author_facet | IEEE Jiwani, Aziz Padhi, Shantanu Waterson, Mark Hall, Peter Bij de Vaate, Jan Geralt |
| author_sort | Jiwani, Aziz |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The SKA is a next generation radio telescope employing phased aperture arrays at its lowest operating band (SKA-low) of 70 - 450 MHz. SKA-low is a dual-polarized array consisting of antenna elements with stable impedance and low cross-polarization. We select the well-known broadband conical spiral antenna and its dual-polarized derivative to be evaluated as candidate elements for SKA-low. Previously, we evaluated the sheet version of the conical spiral and found that it maintained well its broadband characteristics. Looking towards ease of manufacturing, we now evaluate wire versions of the designs. We find that the single-polarized wire version has stable impedance and low cross-polarization from 150 - 450 MHz. However, at low frequencies the cross polarization increases. The dual-polarized version maintains its characteristics over a small band but with higher (> -20 dB) cross polarizations. Measured results confirm the simulated antenna behavior. |
| first_indexed | 2025-11-14T06:05:07Z |
| format | Conference Paper |
| id | curtin-20.500.11937-4982 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:05:07Z |
| publishDate | 2012 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-49822017-09-13T14:45:48Z Candidate Wire Spiral Antennas for the SKA Radio Telescope Jiwani, Aziz Padhi, Shantanu Waterson, Mark Hall, Peter Bij de Vaate, Jan Geralt IEEE SKA Radio Astronomy Antennas The SKA is a next generation radio telescope employing phased aperture arrays at its lowest operating band (SKA-low) of 70 - 450 MHz. SKA-low is a dual-polarized array consisting of antenna elements with stable impedance and low cross-polarization. We select the well-known broadband conical spiral antenna and its dual-polarized derivative to be evaluated as candidate elements for SKA-low. Previously, we evaluated the sheet version of the conical spiral and found that it maintained well its broadband characteristics. Looking towards ease of manufacturing, we now evaluate wire versions of the designs. We find that the single-polarized wire version has stable impedance and low cross-polarization from 150 - 450 MHz. However, at low frequencies the cross polarization increases. The dual-polarized version maintains its characteristics over a small band but with higher (> -20 dB) cross polarizations. Measured results confirm the simulated antenna behavior. 2012 Conference Paper http://hdl.handle.net/20.500.11937/4982 10.1109/ICEAA.2012.6328680 IEEE fulltext |
| spellingShingle | SKA Radio Astronomy Antennas Jiwani, Aziz Padhi, Shantanu Waterson, Mark Hall, Peter Bij de Vaate, Jan Geralt Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title | Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title_full | Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title_fullStr | Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title_full_unstemmed | Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title_short | Candidate Wire Spiral Antennas for the SKA Radio Telescope |
| title_sort | candidate wire spiral antennas for the ska radio telescope |
| topic | SKA Radio Astronomy Antennas |
| url | http://hdl.handle.net/20.500.11937/4982 |