Experimental Demonstration of Focal Plane Array Beamforming in a Prototype Radiotelescope
MetadataShow full item record
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.
Copyright © 2010 IEEE This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Showing items related by title, author, creator and subject.
Adaptive antenna array beamforming using a concatenation of recursive least square and least mean square algorithmsSrar, Jalal Abdulsayed (2011)In recent years, adaptive or smart antennas have become a key component for various wireless applications, such as radar, sonar and cellular mobile communications including worldwide interoperability for microwave ...
Colegate, Timothy; Hall, Peter; Gunst, A. (2012)An important design decision for the first phase of the Square Kilometre Array is whether the low frequency component (SKA1-low) should be implemented as a single or dual-band aperture array; that is, using one or two ...
The Engineering Development Array: A Low Frequency Radio Telescope Utilising SKA Precursor TechnologyWayth, R.; Sokolowski, M.; Booler, T.; Crosse, B.; Emrich, D.; Grootjans, R.; Hall, Peter; Horsley, L.; Juswardy, B.; Kenney, D.; Steele, K.; Sutinjo, Adrian; Tingay, S.; Ung, D.; Walker, M.; Williams, A.; Beardsley, A.; Franzen, T.; Johnston-Hollitt, M.; Kaplan, D.; Morales, M.; Pallot, D.; Trott, Cathryn; Wu, C. (2017)We describe the design and performance of the Engineering Development Array (EDA), which is a low frequency radio telescope comprising 256 dual-polarisation dipole antennas working as a phased-array. The EDA was conceived ...