摘要
采用阵列天线是提高超宽带天线增益和方向性,降低副瓣电平的有效途径。应用时域有限差分法对超宽带TEM喇叭天线进行了时域模拟和分析,利用叠加原理,得到了九元TEM喇叭线阵的时域辐射场信息;结合微遗传算法,对线阵天线的能量方向图进行了优化,获得了较窄的天线波束宽度,同时限制了天线阵列的最大旁瓣电平。与传统遗传算法相比,微遗传算法能更快获得收敛。
The application of antenna array is an effective way to improve the gain and directivity and reduce the side lobe for the ultra-wide band （UWB） antenna. It is different from the traditional narrowband antenna analyzed in frequency domain, the finite-difference time-domain method （FDTD） was used to simulate the UWB transverse electromagnetic （TEM） horn antenna in time domain. According to principle of superposition, the time-domain radiated field of a 9-element linear TEM horn array was then obtained. Combined with micro-genetic algorithm （MGA）, the energy pattern of linear array is optimized and a narrow beam-width is available, while the maximal side-lobe level of the array is limited. Compared with conventional genetic algorithm （GA）, MGA converges more rapidly.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第2期352-355,共4页
Chinese Journal of Radio Science
基金
国家自然基金资助项目(60771020)
