【摘要】 本文提出了一种基于平面圆环阵列的低旁瓣涡旋波束设计方法。从原理上研究了平面圆环阵列内外半径比对涡旋波束的旁瓣电平的影响，并进行了仿真分析。仿真与实验结果表明：设计的单一模态涡旋波束天线，1阶、2阶、3阶模态的仿真旁瓣电平分别低于-32.3 dB、-32.8 dB、-30 dB；对于多模态涡旋波束天线，1阶、2阶、3阶模态的仿真与实验旁瓣电平分别低于-29.8 dB、-30.3 dB、-25.3 dB和-25.4 dB、-30 dB、-24.6 dB。本文方法基于优化的圆环阵列结构和非均匀切比雪夫激励，能够有效抑制涡旋波束的旁瓣电平，适用于多模态涡旋电磁波通信系统的天线设计。更多还原

【Abstract】 This paper proposes a method for designing low sidelobe vortex beams based on planar annular arrays.The effects of the inner and outer radii of the planar annular array on the sidelobe level, divergence angle, and beamwidth of the vortex beams is discussed. Simulation and experimental results show that for a single-mode vortex beam antenna, the simulated sidelobe levels of the 1 st, 2 nd, and 3 rd-order modes are below-32.3 dB,-32.8 dB, and-30.0 dB, respectively, for a multi-model vortex beam antenna, the simulated and measured sidelobe levels of the 1 st,2 nd, and 3 rd-order modes are lower than-29.8 dB,-30.3 dB, and-25.3 dB, and-25.4 dB,-30 dB and-24.6 dB,respectively. The method, based on an optimized annular array structure and non-uniform Chebyshev excitation, can effectively suppress the sidelobe level of vortex beams and is applicable to the antenna design of multi-modal vortex electromagnetic wave communication systems.更多还原