基于差分进化的天线优化设计技术及其应用

【作者】 焦永昌；

【机构】 西安电子科技大学天线与微波技术重点实验室；

【摘要】 论文介绍基于差分进化(DE)算法的天线优化设计技术及其应用。文中首先提出了求解无约束和约束优化问题的多种混合差分进化(HDE)算法。其次,采用无约束HDE算法优化设计了Yagi-Uda天线和宽带E形贴片天线,采用约束HDE算法优化设计了宽带低副瓣不等间距直线阵。最后,采用HDE算法解决了某卫星天线正样辐射相位方向图多项式函数拟合问题,达到了系统所要求的相位拟合精度,所得数据已经成功应用于2011年9月19日发射的中星1A卫星。仿真和应用结果表明,基于改进DE算法的天线优化设计技术是十分有效的。更多还原

【Abstract】 Optimal design techniques for antennas based on the differential evolution(DE) algorithms and their applications have been addressed in this paper. First, several hybrid DE(HDE) algorithms for solving unconstrained and constrained optimization problems are proposed respectively. Then, the unconstrained HDE algorithm is used to optimize the Yagi-Uda antenna and the wideband E-shaped patch antenna. By utilizing the constrained HDE algorithm, the wideband aperiodic linear arrays are optimized to minimize their sidelobe levels. Finally, the HDE algorithm is used to solve successfully the phase polynomial fitting problems for a multi-beam satellite antenna. The phase fitting accuracies required by the system have been achieved, and the obtained data have been successfully applied to the ChinaSat 1 A satellite launched in September 19, 2011. Simulation and application results demonstrate that the modified DE algorithms are very effective for the antenna optimization.更多还原