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毫米波赋形偏馈双反射面天线技术

Keywords: 赋形,偏馈,几何光学,口径效率

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Abstract:

为了实现一种具有高口面辐射效率、斜波束出射能力的口径天线,采用几何光学方法设计了一种偏馈双反射面天线.天线主反射面采用赋形设计,副反射面的设计过程中采用Snell定理作为约束条件.通过理论公式、数值模拟仿真和实验测试研究,实现了一种出射波束口径为110cm、天线口面场分布为抛物形分布、波束出射方向与竖直方向成20?夹角的赋形偏馈双反射面天线.在中心频率95GHz下,实测天线增益为59.7dB,第一副瓣电平为-19dB,天线口径效率达到78%.

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