Active lens: a mass, volume, and energy efficient antenna for space-based radar

Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509) Pub Date : 2004-04-26 DOI:10.1109/NRC.2004.1316385

M. Grace, B. Norvell, K. Higgins, M. Gilbert, H. Kazemi

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引用次数: 2

Abstract

Very large, lightweight phased array antenna apertures are highly desirable for space-based ground surveillance and tracking radars since power is limited by the mass efficiency of solar power collection and distribution systems which compete for the limited payload capability of the launch vehicle. This leads to relatively low power density apertures whose power budget can be dominated by the overhead (non-radiated) power used during the receive portion of the radar timeline. We have developed a novel lens antenna concept to meet the extreme demands of next-generation, large-aperture space-based radar with significantly improved electrical and mechanical efficiency. The agile beam design offers better aperture efficiency over the entire field of regard compared with reflector designs and better electrical and mass efficiency than active array designs. The lens contains embedded MMIC modules that have been optimized for low power consumption on receive, a significant departure from T/R modules used in airborne radar applications.

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有源透镜:用于天基雷达的一种质量、体积和节能的天线

非常大、重量轻的相控阵天线孔径对于天基地面监视和跟踪雷达来说是非常理想的，因为功率受到太阳能收集和分配系统的质量效率的限制，这些系统竞争运载火箭有限的有效载荷能力。这导致相对较低的功率密度孔径，其功率预算可以由雷达时间线接收部分期间使用的架空(非辐射)功率主导。我们开发了一种新颖的透镜天线概念，以满足下一代大口径天基雷达的极端要求，并显着提高了电气和机械效率。与反射器设计相比，敏捷波束设计在整个领域具有更好的孔径效率，并且比有源阵列设计具有更好的电学和质量效率。该透镜包含嵌入式MMIC模块，该模块已针对接收时的低功耗进行了优化，这与机载雷达应用中使用的T/R模块有很大不同。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)

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