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为了以多个性能近似一致的点波束覆盖服务区,提出了一种新型赋形多波束天线设计方法。优化过程中将天线口径投影面内的相位分布和各个馈源的位置作为优化变量,然后以不同位置波束的增益和旁瓣作为目标函数,最后利用极小极大值算法获得高增益低旁瓣多波束覆盖。数值仿真结果表明了优化设计的有效性,解决了传统标准单口径单馈源多波束天线旁瓣电平高、波束交叠增益低的问题。
In order to cover the service area with multiple spot beams with similar performance, a new design method of multi-beam antenna is proposed. In the optimization process, the phase distribution of the antenna aperture projection plane and the position of each feed are taken as the optimization variables. Then, the gain and sidelobe of the beam in different positions are taken as the objective function. Finally, the maximum and minimum gain Multi-beam coverage. The numerical simulation results show the effectiveness of the optimization design, and solve the problem of high sidelobe level and low beam overlap gain of the single-aperture single-feed multi-beam antenna of the traditional standard.