分形天线的特性分析及其在MIMO天线中的应用

分形最基本的特征是自相似特性与分数维,可以很好地应用于设计天线.与传统天线相比,在性能保持相近的情况下,分形天线表现出两个突出的优势:减小天线尺寸和使天线在多频带下工作.文中以Koch天线、分形树天线和分形环天线为例,说明了分形天线减小天线尺寸的优势;以Sierpinski基垫天线为例,说明了分形天线增加天线工作频带的优势.还对Minkowski分形天线阵列进行了分析,表明作为天线阵列单元的分形天线,可以提高天线阵的辐射特性.文中提出了将Minkowski分形天线应用于多输入输出(MIMO)天线中.

The Fractal Antenna Characteristics Analysis and its Application to MIMO Antenna

The basic characteristics of the fractal antenna are the self-similarity and the fractional dimension, which can be applied well to design the antennas.Compared to the traditional antennas with similar antenna performance,fractal antennas have two prominent advantages: reduced antenna size and ability of making antenna work in several frequency bands.This paper shows the advantange of reducing antenna sizeusing examples of Koch antenna,fractal tree antenna and fractal loop antenna,and shows the advantage of making antenna work in several frequency bands with the example of Sierpinski antenna.The paper also analyses the Minkowski fractal antenna array,and it shows that the radiation performance of the antenna array can be improved when the array element is fractal antenna.At last ,the application of the Minkowski fractal antenna in the MIMO antenna is introduced.