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Active antenna development for the SKA

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Authors
Jiwani, A.
Juswardy, Budi
Padhi, Shantanu
Bij De Vaate, J.
Hall, Peter
Date
2011
Type
Conference Paper

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Jiwani, A. and Juswardy, B. and Padhi, S. and Bij De Vaate, J. and Hall, P. 2011. Active antenna development for the SKA, in na (ed), 2011 Asia-Pacific Microwave Conference Proceedings (APMC 2011), Dec 5 2011, pp. 1186-1189. Melbourne, Australia: IEEE.
Source Title
Asia-Pacific Microwave Conference Proceedings, APMC
Source Conference
2011 Asia-Pacific Microwave Conference Proceedings (APMC 2011)
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Department of Electrical and Computer Engineering
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Abstract

The Square Kilometre Array (SKA) will be the most sensitive radio telescope ever built. It is divided into three operating bands. Sparse aperture arrays (SKA-low) are used at the lowest operating band of 70 - 450 MHz. The International Centre for Radio Astronomy (ICRAR) is exploring conical spiral antennas as one candidate antenna design for SKA-low. One of the attractive features of the conical spiral antenna is its frequency-stable impedance. This helps in matching it to external components such as a low-noise amplifier (LNA). A prototype LNA based on GaAs HEMT technology that might be suitable for the conical spiral antenna has been evaluated. Presented in this paper is the current design path for a conical spiral antenna with attached LNA. © 2011 Engineers Australia.