基于遗传算法的超宽带天线设计

UWB Antenna Design Based on Genetic Algorithm

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 new planar uhra-wideband antenna was designed, using genetic algorithm combined with finite difference time domain method, by which searching for a plannar microstrip antenna locally. Voltage standing wave ratio of the antenna was less than 2 in 3 - 11GHz which met index requirements of the FCC rules. The proposed antenna was fabricated and test-ed. Measured results, CST simulation results and numerical results were basically consistent and met the design require-ments. Antenna radiation pattern and gain characteristics were analyzed. The results show that the design method of the an-tenna is correct and effective. Compared with global search, it improves design effenciency. The performance of the designed antenna, with high practical value, is excellent.