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Predicting Sparse Array Performance From Two-Element Interferometer Data.
- Source :
-
IEEE Transactions on Antennas & Propagation . Feb2012 Part 2 Part 2, Vol. 60 Issue 2, p886-894. 9p. - Publication Year :
- 2012
-
Abstract
- Widely distributed (sparse) ground-based antenna arrays are being considered for deep space communications applications with the development of the proposed Next Generation Deep Space Network. However, atmospheric-induced phase fluctuations can impose daunting restrictions on the performance of such an array, particularly during transmit and particularly at Ka-band frequencies, which have yet to be successfully resolved. In this paper, an analysis of the uncompensated performance of a sparse antenna array, in terms of its directivity and pattern degradation, is performed utilizing real data. The theoretical derivation for array directivity degradation is validated with interferometric measurements (for a 2-element array) recorded at Goldstone, CA, from May 2007—May 2008. With the validity of the model established, an arbitrary 27-element array geometry is defined at Goldstone, CA, to ascertain its theoretical performance in the presence of phase fluctuations based on the measured data. Therein, a procedure in which array directivity performance can be determined based on site-specific interferometric measurements is established. It is concluded that a combination of compact array geometry and atmospheric compensation is necessary to minimize array loss impact for deep space communications. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 0018926X
- Volume :
- 60
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Antennas & Propagation
- Publication Type :
- Academic Journal
- Accession number :
- 71539988
- Full Text :
- https://doi.org/10.1109/TAP.2011.2173110