Test-Driven Design of an Active Dual-Polarized Log-Periodic Antenna for the Square Kilometre Array
Date Issued
2020
Author(s)
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Mezzadrelli, Lorenzo
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Tibaldi, Alberto
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Virone, Giuseppe
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Bercigli, Mirko
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Ciorba, Lorenzo
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Ninni, Paola Di
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Loi, Vittorio Giuseppe
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Paonessa, Fabio
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Abstract
An active dual-polarized Log-Periodic antenna has been designed to meet the requirements of the low-frequency (50-350 MHz) radio telescope of the Square Kilometre Array (SKA). The integration of antenna and low noise amplifier has been conceived in order to achieve a high degree of testability. This aspect has been found to be crucial to obtain a smooth frequency response compatible with the SKA science cases. The design has also been driven by other factors such as the large-volume production (more than 130 000 antennas will be built) and the environmental conditions of the harsh Australian desert. A specific verification approach based on both wideband radiometric spectral and spatial measurements in relevant laboratory and in-situ conditions has been developed. Electromagnetic analyses and experimental results exhibit a very good agreement. In December 2019, this antenna was part of the reference solution for the System Critical Design Review of the SKA.
Volume
1
Issue
1
Start page
253
Issn Identifier
2637-6431
Rights
open.access
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