Terdragon及Terdragon-6分形天线阵研究

根据Terdragon及Terdragon-6曲线，设计阵列天线，恰当分配曲线在坐标系中的位置，由曲线本身的自相似性，采用迭代算法进行了快速方向图计算．仿真结果表明：Terdragon及Terdragon-6分形阵实现了低副瓣。并且克服了单位幅度激励的均匀方形面阵在阵间距达到工作波长时出现栅瓣的问题．随着迭代阶数的增加，主瓣越来越窄，过渡带变陡，副瓣越来越低．另一方面，随着阵间距的增加，副瓣降低、主瓣变窄、过渡带变陡．

The research of fractal antenna arrays of Terdragon and Terdragon-6

Antenna arrays are designed on the basis of Terdragon and Terdragon-6. The curves are properly placed in Cartesian coordinates. The iterative algorithm is used to quickly calculate the radiation patterns. Both Terdragon and Terdragon-6 have the desirable property of low-sidelobe, having no grating lobes even when the minimum spacing between elements reaches one-wavelength. As the iteration number increases, the main lobe becomes narrower, the rolloff becomes steeper, and the side lobe becomes lower. On the other hand, as the spacing between the elements increases, the same phenomenon occurs.