Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope
Focal plane arrays are being developed to provide dishes with a wide field of view for both the next generation of radiotelescopes and to retrofit existing large radiotelescopes. We describe a prototype radiotelescope, comprising a two dish interferometer with real-time digital beamformer that was b...
| Main Authors: | , , , |
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| Format: | Journal Article |
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IEEE
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/34996 |
| _version_ | 1848754375825031168 |
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| author | Hayman, D. Bird, T. Esselle, K. Hall, Peter |
| author_facet | Hayman, D. Bird, T. Esselle, K. Hall, Peter |
| author_sort | Hayman, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Focal plane arrays are being developed to provide dishes with a wide field of view for both the next generation of radiotelescopes and to retrofit existing large radiotelescopes. We describe a prototype radiotelescope, comprising a two dish interferometer with real-time digital beamformer that was built to study focal plane array systems. Two beamformer weightings were applied to the system: A normalized conjugate match and the maximum sensitivity (G/T). Both incorporate the uncorrelated noise from the receiver chains and the latter includes correlated noise from spillover and coupling in the array. A black box approach is taken where the assembled system is considered and the only accessible data is that typically available from an operational radiotelescope. This approach is particularly suitable for complex active antennas where there is insufficient knowledge of the system for beamformer weights to be set a priori. It also allows adaptation to changes such as electronic gain drift, partial failures and alterations in the environment. |
| first_indexed | 2025-11-14T08:39:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-34996 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:39:25Z |
| publishDate | 2010 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-349962017-09-13T15:51:39Z Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope Hayman, D. Bird, T. Esselle, K. Hall, Peter antenna array mutual coupling antenna array feeds radio astronomy antenna measurements Active arrays Focal plane arrays are being developed to provide dishes with a wide field of view for both the next generation of radiotelescopes and to retrofit existing large radiotelescopes. We describe a prototype radiotelescope, comprising a two dish interferometer with real-time digital beamformer that was built to study focal plane array systems. Two beamformer weightings were applied to the system: A normalized conjugate match and the maximum sensitivity (G/T). Both incorporate the uncorrelated noise from the receiver chains and the latter includes correlated noise from spillover and coupling in the array. A black box approach is taken where the assembled system is considered and the only accessible data is that typically available from an operational radiotelescope. This approach is particularly suitable for complex active antennas where there is insufficient knowledge of the system for beamformer weights to be set a priori. It also allows adaptation to changes such as electronic gain drift, partial failures and alterations in the environment. 2010 Journal Article http://hdl.handle.net/20.500.11937/34996 10.1109/TAP.2010.2046843 IEEE fulltext |
| spellingShingle | antenna array mutual coupling antenna array feeds radio astronomy antenna measurements Active arrays Hayman, D. Bird, T. Esselle, K. Hall, Peter Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title | Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title_full | Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title_fullStr | Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title_full_unstemmed | Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title_short | Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope |
| title_sort | experimental demonstration of focal plane array beamforming in a prototype radiotelescope |
| topic | antenna array mutual coupling antenna array feeds radio astronomy antenna measurements Active arrays |
| url | http://hdl.handle.net/20.500.11937/34996 |