基于MOEA/D算法的三陷波超宽带天线设计

Design of Ultra-Wide Band Antenna with Triple Band Notch Based on MOEA/D Algorithm

为实现超宽带通信中对WIMAX(3.3~3.7 GHz)、WLAN(5.150~5.825 GHz)和ITU(8.01~8.50 GHz)频段干扰的抑制,提出了一种基于MOEA/D算法优化设计的具有三陷波特性的超宽带天线。天线采用T形结构作为辐射贴片,通过改变贴片形状等方法实现在3~12 GHz的超宽带。在辐射贴片上刻蚀两个U形缝隙和在传输线两侧加载C形开口环,对天线进行陷波设计。利用MOEA/D算法对陷波结构的结构参数和加载位置进行优化,实现了在3.31~3.69 GHz、5.25~6.13 GHz和8.01~8.51 GHz频段的陷波效果,成功抑制了频段干扰。与传统扫频优化的设计方法相比,采用MOEA/D算法设计的天线在陷波频带内增益低至-19 dB,各陷波频带准确度误差均在3.6%以下,提高了天线的设计效率,具有一定的工程应用价值。

In order to suppress interference in WIMAX(3.3-3.7 GHz),WLAN(5.150-5.825 GHz)and ITU(8.01-8.50 GHz)bands in ultra-wide band communication,an ultra-wide band antenna with three notch characteristics optimized based on MOEA/D algorithm is proposed.The antenna adopts a T-shaped structure as a radiating patch and realizes 3-12 GHz ultra-wide band by changing the shape of the patch.Two U-shaped slots are etched on the radiating patch,and C-shaped open rings are loaded on both sides of the transmission line to design the notch of the antenna.MOEA/D algorithm is used to optimize the structural parameters and loading positions of the notch structure,achieving notch effects in the frequency bands of 3.31-3.69 GHz,5.25-6.13 GHz and 8.01-8.51 GHz with successfully suppressed band interference.Compared with the traditional design method of frequency sweep optimization,the antenna designed by MOEA/D algorithm has a gain as low as-19 dB in the notch band,and the accuracy error of each notch frequency band is less than 3.6%,which improves the design efficiency of the antenna and has certain engineering application value.