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焦面场分析与相控阵馈源设计 被引量:15

Focal Field Analysis and Phased Array Feed Design
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摘要 该文介绍了焦面场的计算方法及其与反射面焦径比的关系,分析了焦面场与馈源口径场的联系,并建立了基于焦面场分析进行相控阵馈源设计的方法,包括确定单元间距、阵列规模以及实现目标方向图所需要的激励。按照这一方法,分别以未赋形卡塞格伦天线和前馈抛物面天线为对象,设计了各自的相控阵馈源以实现赋形波束的效果,并在后者上验证了波束扫描性能。通过仿真,天线性能实现了预定目标,证明了设计方法的有效性。 A method of calculating focal field is introduced,and the connection between focal field,which depends on the reflector geometry,and the aperture field of feed is analyzed.Based on focal field distribution,a design method of phased array feed,including element spacing determination,phased array scale,and excitations for expected radiation pattern is presented.Two phased array feeds are designed to realize shaped beams for an un-shaped Cassegrain antenna and shaped scanning beams for a prime-focus parabolic antenna respectively.The numerical analyses demonstrate the effectiveness of the approach.
出处 《电子与信息学报》 EI CSCD 北大核心 2013年第5期1236-1240,共5页 Journal of Electronics & Information Technology
基金 国家973计划项目(2012CB821800) 国家自然科学基金国际合作与交流项目(11261140641) 中国科学院重点部署项目(KJZD-EW-T01)资助课题
关键词 反射面天线 多波束 焦面场 相控阵馈源 Reflector antenna Multi-beam Focal field Phased Array Feed(PAF)
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