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On the front-end design of mid-frequency aperture array for square kilometre array

机译：平方公里阵列中频孔径阵列的前端设计

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摘要

Complementary to the conventional dish radio telescopes, aperture arrays provide a technically attractive approach to achieve a large field of view and flexibility in observational parameters e.g. Sky area vs. bandwidth. Designs of both aperture array elements and overall geometry for the SKA Mid Frequency Aperture Array are presented here, together with resulting trade-offs. The paper reports the latest developments of global efforts on the front-end design of Mid-Frequency Aperture Array, not attempting to make technology selections, as the priority of sciences and the time for implementing Mid-Frequency Aperture Array is yet to be fully confirmed. Different on-going front-end solutions are introduced, particularly crossed ring antenna array with a planar structure is explored in more detail as it is less known in the community. Key performances of the candidate front-end technologies are addressed by examining the prototypes. The objective of the collaborative study is to increase technology readiness for implementation of Mid-Frequency Aperture Array in the future.
机译：孔径阵列互补，孔径阵列提供了一种技术上有吸引力的方法，以实现观察参数的大视野和灵活性。天空区与带宽。这里介绍了孔径阵列元件的设计和SKA中频孔径阵列的整体几何形状，以及得到的折衷。本文报告了全球努力的最新发展在中频光圈阵列的前端设计，而不是试图进行技术选择，作为科学的优先级以及实现中频孔径阵列的时间尚未得到完全确认。引入不同的持续的前端解决方案，特别详细探讨了具有平面结构的交叉环天线阵列，因为它在社区中较少。通过检查原型来解决候选前端技术的关键性能。协作研究的目的是提高未来中频光圈阵列的技术准备。

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