分形环单元八木天线的特性

Characteristics of fractal loop Yagi-Uda arrays

介绍了应用分形原理设计环八木天线,采用分形环单元来替代传统环八木天线的圆环或方环,利用分形图形的空间填充特性来减小横向设计尺寸,以实现天线的小型化设计。以中心频率为900MHz的Minkowski分形环单元八木天线为例,说明了天线的设计过程,设计结果表明该天线具有较为理想的技术指标,同时,相对于传统的环八木天线,采用分形结构可以使尺寸明显减小。

This paper presents the application of fractal theory in the design of loop Yagi-Uda array. Replacing the circle or square loop elements of traditional loop Yagi-Uda array with fractal loop elements, the transverse size of the antenna is re- duced. Benefiting from the space filling property of fractals, we realize the minia- turization of loop Yagi-Uda array is realized. As an example, a 900MHz Minkowski fractal loop Yagi-Uda array is designed and fabricated. The antenna has good radia- tion properties, and its size is apparently reduced compared to the square loop Yagi- Uda array.