基于Minimax的多口径多波束天线赋形  

Multi aperture multi-beam antenna shaping based on Minimax

作　　者：王路阳 万继响 WANG Lu-yang;WAN Ji-xiang(China Academy of Space Technology(Xi'an),Xi'an 710100,China)

机构地区：[1]空间技术研究院西安分院,陕西西安710100

出　　处：《电子设计工程》2019年第1期70-74,79,共6页Electronic Design Engineering

摘　　要：针对目前卫星通信中标准的多波束天线载干比偏低的问题,提出了一种基于Minimax算法的反射面赋形方法。研究了Minimax算法的数学模型和求解方法,提出了能在反射面赋形中应用的公式,并给出了非线性规划求解的方法。自定指标设计了四口径多波束天线,计算了天线的电参数,仿真计算了该天线的载干比。自编基于口径场法求解反射面天线远区场的计算程序,并验证了其正确性。依据Minimax算法提出了反射面优化的目标函数和反射面重构的方程,基于此完成了对反射面的赋形。结果表明,反射面赋形后的多口径多波束天线其载干比相比于赋形前提高了2 dB,具有更好的辐射性能。Aiming at the problem of low C/I of standard multi-beam antenna in satellite communication,This paper presents a method of shaping reflector antenna based on Minimax.This paper studies the mathematical model and solving method of Minimax algorithm and proposes a formula that can be applied to the shaping reflector antenna and then gives a method for solving nonlinear programming.A multibeam antenna with four apertures is designed and the electrical parameters of the antenna are calculated,and its C/I is simulated.In this paper,the calculation procedure of the far field of the reflector antenna based on the aperture field method is self-edited,and its correctness is verified.According to the objective function and the reconstruction of the reflector,the shaping of the reflector is completed.The results shows that the shaped antenna has a2dB increase in C/I compared to the unshaped antenna and it has a better radiation performance.

关 键 词：多口径天线 多波束天线 MINIMAX 赋形 载干比 

分 类 号：TN828.5[电子电信—信息与通信工程]