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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 d B,该天线实现了低剖面和高效率的优良性能。
Based on the non-uniform rational B-spline surface modeling, a low profile elliptical beamforming antenna design method is proposed. Based on the radiation pattern of the feed horn and the distribution function of the surface field of the main reflector, the curves of the primary and secondary reflector surfaces of φ = 0 ° are shaped and the shape curves of the primary reflector and the secondary reflector are calculated. By using the non-uniform reasoning B-spline surface modeling technique was used to model the primary and secondary reflecting surfaces and the simulation was optimized with full-wave simulation software. The simulation results show that the elliptical beam antenna designed by this method has 67.82% and 65.38% efficiency at 12.5 GHz and 14.5 GHz, respectively, and the first sidelobe level is less than -14 d B. The antenna achieves low profile and high efficiency Excellent performance.