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arXiv 1703.00537astro-ph.IM
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SKA孔径阵列验证系统:使用微型UAV进行电磁建模和波束方向图测量

SKA Aperture Array Verification System: Electromagnetic modeling and beam pattern measurements using a micro UAV

E. de Lera Acedo, P. Bolli, F. Paonessa, G. Virone, E. Colin-Beltran, N. Razavi-Ghods, I. Aicardi, A. Lingua, P. Maschio, J. Monari, G. Naldi, M. Piras, G. Pupillo

摘要:

本文介绍了平方公里阵列望远镜低频仪器16元超宽带稀疏随机测试阵列的电磁建模和波束方向图测量。我们讨论了一个小阵列测试平台的技术和技术的发展对最终的望远镜的重要性,突出了其设计的最相关的方面。我们还描述了电磁仿真和建模工作,以及使用无人机系统的嵌入式元件和阵列方向图测量。由于无人机发射的射频信号稳定、准确、强,后者既有助于模型和设计的验证,也有助于望远镜未来的仪器校准。在设计的这个阶段,这些测量结果显示出实验结果和数值数据之间的一般协议,并揭示了未校准的电缆长度在阵列图案的内旁瓣的局部效应。

英文摘要:

In this paper we present the electromagnetic modeling and beam pattern measurements of a 16-elements ultra wideband sparse random test array for the low frequency instrument of the Square Kilometer Array telescope. We discuss the importance of a small array test platform for the development of technologies and techniques towards the final telescope, highlighting the most relevant aspects of its design. We also describe the electromagnetic simulations and modeling work as well as the embedded-element and array pattern measurements using an Unmanned Aerial Vehicle system. The latter are helpful both for the validation of the models and the design as well as for the future instrumental calibration of the telescope thanks to the stable, accurate and strong radio frequency signal transmitted by the UAV. At this stage of the design, these measurements have shown a general agreement between experimental results and numerical data and have revealed the localized effect of un-calibrated cable lengths in the inner side-lobes of the array pattern.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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