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利用遗传算法结合时域有限差分法对一款平面微带天线进行局部搜索,设计出了一种新型平面超宽带天线,该天线在3～11GHz频段内电压驻波比小于2,满足了FCC规定的指标要求。将天线加工成实物,对天线性能进行测试,实测结果、CST仿真结果和数值计算结果基本吻合,达到了设计要求。由天线的方向图和增益特性结果显示,该天线的设计方法正确有效,相较于全局搜索,提高了设计效率;所设计的天线性能优良,具有较高的实用价值。
A local planar ultra-wideband antenna was designed by using the genetic algorithm combined with time-domain finite-difference method to search a planar microstrip antenna. The antenna has a VSWR of less than 2 in the frequency band from 3 to 11GHz and meets FCC requirements The index requirements. The antenna is processed into real objects, and the performance of the antenna is tested. The measured results show that the CST simulation results are in good agreement with the numerical results and meet the design requirements. The results of the antenna pattern and gain characteristics show that the design method of the antenna is correct and effective, and the design efficiency is improved compared with the global search. The designed antenna has good performance and high practical value.