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八木天线是一种常用的天线形式。本文将Minkowski分形环应用于八木天线设计中,利用分形结构的空间填充特性来减小天线的横向尺寸,从而实现天线小型化设计。设计了工作于880～960MHz的6元二阶Minkowski分形环八木天线,以矩量法为核心对设计天线进行数值分析,将线天线模拟为细带线模型,天线表面采用三角单元进行剖分,RWG基函数作为电流展开函数。同方环八木天线进行了比较,在驻波特性、辐射特性相似情况下,分形环八木天线的尺寸缩减了29.8%。
Yagi antenna is a commonly used antenna form. In this paper, the Minkowski fractal ring is applied to the Yagi antenna design, and the space filling characteristics of the fractal structure are utilized to reduce the lateral dimension of the antenna so that the antenna can be miniaturized. A 6 order 6 order Minkowski fractal ring Yagi antenna operating at 880 ~ 960 MHz is designed. The numerical analysis of the designed antenna is carried out with the moment method as the core. The antenna is simulated as a thin strip - line model. RWG basis function as a current expansion function. Compared with the ring Yagi antenna, the dimension of the fractal ring Yagi antenna is reduced by 29.8% under the similar standing wave characteristics and radiation characteristics.