基于非均匀有理B样条曲面建模，提出一种低剖面椭圆波束赋形天线设计方法。利用馈源喇叭的辐射方向图和主反射面口面场分布函数，对φ=0°面的主副反射面曲线赋形，计算任意φ平面的主副反射面赋形曲线，利用非均匀有理B样条曲面建模技术对主副反射面建模并用全波仿真软件进行仿真优化。仿真结果表明，用该方法设计的椭圆波束天线在12.5 GHz和14.5 GHz时效率分别为67.82％和65.38％，第一副瓣电平均小于-14 dB，该天线实现了低剖面和高效率的优良性能。

A new design method for a low profile shaped antenna with an elliptical beam based on the non uniform rational B-spline surface modeling is proposed. The curves of the main reflector and sub-reflector in the plane when are calculated based on the radiation pattern of the feed horn and the selected aperture field distribution function by using a shaping method; Then shape the curves of the main reflector and sub reflector in any plane; Finally, model the main reflector and sub-reflector surfaces by using the non-uniform rational B-spline surface modeling and optimized by using full-wave simulation software. The simulation results show that the efficiencies of the designed elliptical beam antenna are 67.82％ and 65.38％ at 12.5 GHz and 14.5 GHz, respectively, the first side-lobes are less than -14 dB, the antenna achieves the performances of low profile and high efficiency.

TN82