球面共形微带天线的优化设计

Optimization and Design of Spherically Conformal Microstrip Antenna

针对球面共形微带天线带宽窄的缺陷,采用自适应差分进化算法结合矩量法成功实现对球面共形微带天线的优化设计。对自适应差分进化算法中的种群初始化、控制参数的选择等方面进行了详细的讨论。在搜索过程中,提出一种"先测向后定位"的搜索策略,首先采用粗优化方式找到控制天线性能基因的大致位置,然后在找到的位置进行细优化,进一步提高天线的性能。这种粗、细优化相结合的方式在保证优化效果的情况下,大大降低种群的数量,提高了优化效率。最后,分别优化出宽频带以及工作在双频点的球面共形微带天线,优化结果与仿真软件对比,验证了本文分析处理的正确性与有效性。

Due to the narrow bandwidth of spherically conformal microstrip antenna, the Adaptive Differential Evolu- tion algorithm （ADE） combined with the method of moments （ MoM ） is a successful implementation of the spherically con- formal microstrip antenna optimization design. In the Adaptive Differential Evolution algorithm, the population initialization and the selection of control parameters are discussed in detail. A search strategy of ＂direction first and location later＂ is a- dopted in the process. The probable genic location which controls santenna characteristic is found by coarse optimization first- ly, and then delicate optimization is presented to improve antenna＇s characteristics further. The combination of coarse and delicate optimization can decrease the number of population largely and improve optimization efficiency while ensuring the ac- curacy of the optimization results. Finally, the spherically conformal microstrip antenna with wide band and the one with dual frequency points are optimized respectively. The optimization results are in good agreement with ones from simulation soft- ware, which shows the validity and effectiveness of the method in this paper.