混合编码方式自适应差分进化算法优化设计宽带天线

Optimization and design of wideband antenna with adaptive differential evolution algorithm based on hybrid coding method

针对传统微带天线带宽窄的缺陷,提出了一种混合编码方式的自适应差分进化算法来优化展宽带宽。该方法先对贴片和地板采用网格编码进行粗优化,再对去除的贴片和地板部分采用基函数编码进行细优化,通过寻优得到了一款新型的宽带天线,带宽从11~15GHz展宽到了9~17.5GHz左右,天线带宽展宽率达到了112.5%。该方法计算精度高,通用性强,通过两步优化大大减小了计算量,基函数编码提供了优化天线的新思路。

As the traditional microstrip antenna has the disadvantage of narrow bandwidth,a kind of adaptive differential evolution algorithm based on hybrid coding methods is put forward,which optimizes the antenna with two steps.Firstly,the shape of the antenna patch and ground plane is coarsely optimized with the grid coding method.Secondly,the removal part of the area optimized in the first step is finely optimized with the basis function coding method.A new wideband antenna can be obtained after the two-step optimization,the bandwidth of the antenna is extended from 11~15GHz to about 9~17.5GHz,achieving a broadening rate of112.5%.The method has high calculation precision and strong versatility,which greatly reduces the amount of computation through the two-step optimization.In addition,this method provides a new way to optimize the antenna based on the basis function coding.