新型分形结构在印刷振子中的应用

Applications of Novel Fractal Geometry in Printed Dipoles

为了设计小型化、多频化的印刷振子,采用递归法构造了一种新型的分形结构,并设计了单层分形印刷振子,利用AnsoftHFSS软件对天线进行仿真优化,结果表明:新型单层分形印刷振子尺寸缩减性优于Hilbert单层分形印刷振子。针对单层分形印刷振子频比固定的不足,提出了双层分形印刷振子模型,仿真结果表明:除具备单层分形印刷振子的所有特性外,双层分形印刷振子还具备频比可调特性,这将大大解决目前印刷振子所面临的小型化、多频化难题。

In order to design compact and multi- band printed dipoles,the technique of recursion is introduced to construct a novel fraetal structure,and the single layer fractal printed dipole which uses the fractal structure is simulated and optimized by Ansoft HFSS. The characteristics of the fractal antenna are demonstrated by simulated results that it has compact dimension compared with the Hilbert single layer fraetal printed dipole. Because the ratio between frequencies of the single layer fractal dipole is invariable,the double layer fractal printed dipoles are proposed. The characteristics of fmctal antennas are demonstrated by simulated results that the ratio between frequencies of the double layer fractal printed dipoles are variable besides all the characteristics of the single layer fmctal printed dipole. The problem of compactness and multi- band will be solved with which the printed dipoles are faced.