Design of shaped millimeter wave focus antenna with dual-reflector
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摘要: 为实现一种具有近场聚焦、斜波束出射能力的偏馈口径天线,采用几何光学方法设计了一种赋形聚焦双反射面天线。基于光线传播的能量守恒定律、Snell定律及光径长度相等三个光学定律开展了天线主反射面赋形设计,副反射面的设计采用 Snell 定理作为约束条件。 通过理论公式和实验测试研究,实现了一种出射波束口径为 110 cm、波束出射方向与竖直方向成 20夹角的赋形聚焦偏馈双反射面天线。在中心频率 95 GHz 下,实测相位实现近场聚焦,出射波束与垂直方向成20夹角。Abstract: A shaped scheme based on geometric optics for offset-fed dual-reflector focus antenna is presented. The main reflector is a shaped antenna based on conservation of energy along a ray tube, Snells law, uniform phase and equal path length. Only Snells law is imposed on the sub-reflector. Based on this design solution, theoretical analysis, numerical simulation and experimental test are carried out for a 110 cm dish baseline system with an angle of 20 between x axis and the beam. The experiment shows that at 95 GHz, the antenna has a well focusing through phase measurement with an angle of 20 between x axis and the beam.
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Key words:
- focus antenna /
- dual-reflector antenna /
- geometric optics /
- shaped antenna
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