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.

中文翻译：

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平方公里阵列有源双极化对数周期天线的测试驱动设计

设计了有源双极化对数周期天线，以满足平方公里阵列（SKA）的低频（50 – 350 MHz）射电望远镜的要求。为了实现高度的可测试性，已经设想了天线和低噪声放大器的集成。已经发现这一方面对于获得与SKA科学案例兼容的平滑频率响应至关重要。该设计还受到其他因素的驱动，例如大批量生产（将建造13万多条天线）以及澳大利亚沙漠的环境条件。已经开发了一种基于相关实验室和现场条件下的宽带辐射光谱和空间测量的特定验证方法。电磁分析和实验结果显示出很好的一致性。