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An outdoor antenna metrology facility for candidate Square Kilometre Array antennas

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Open access
Authors
Jiwani, A.
Flexman, J.
Padhi, S.
De Vaate, J.
Hall, Peter
Date
2011
Type
Conference Paper

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Jiwani, A. and Flexman, J. and Padhi, S. and de Vaate, J. and Hall, P. 2011. An outdoor antenna metrology facility for candidate Square Kilometre Array antennas, in Electromagnetic Compatibility Symposium (EMCSA), Nov 9-11 2011, pp. 1-4. Perth: IEEE.
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Electromagnetic Compatibility Symposium and Exhibition, EMCSA 2011 - Symposium Proceedings
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Department of Electrical and Computer Engineering
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Abstract

The Square Kilometre Array (SKA) will be the largest radio telescope ever built operating at multiple frequency bands. The lowest band, SKA-low, covers 70 - 450 MHz and consists of sparse aperture arrays. The International Centre for Radio Astronomy Research (ICRAR) is investigating conical spirals as one candidate antenna for SKA-low. These large (~1 m) low frequency antennas are characterized using a quick and efficient procedure called the 'car-park' pattern measurement method. To verify the viability of the method, the characteristics of scaled conical spiral antenna prototypes, measured in both the car-park and an anechoic chamber, are compared in this paper. Initial indications confirm the reliability of the car-park measurement method and, by extrapolation, its suitability measuring full-sized antennas.