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提出一种基于混合粒子群算法(HPSO)的低旁瓣波束扫描反射阵天线设计方法。在该方法中,首先利用天线实际方向图和渐变的理想方向图构建了加权的适应度函数。然后通过优化口径面相位分布搜索适应度函数的最小值,最终达到降低旁瓣的目的。同时,设计并制作了一副中心频率为12GHz的圆极化波束扫描反射阵天线。实测结果与仿真结果较为吻合,天线在56°扫描范围内,旁瓣电平均小于-15d B,且带宽达到11.67%。
A low-sidelobe beam-scanning reflection array antenna design method based on hybrid particle swarm optimization (HPSO) is proposed. In this method, a weighted fitness function is first constructed using the antenna actual pattern and the graded ideal pattern. Then the minimum of the fitness function is searched by optimizing the phase distribution of the caliber and finally the purpose of reducing the side lobe is achieved. At the same time, a circularly polarized beam scanning reflector array antenna with a center frequency of 12GHz was designed and fabricated. The measured results are in good agreement with the simulation results. The antenna has a sidelobe level less than -15d B and a bandwidth of 11.67% within a scanning range of 56 °.