一种基于Minkowski分形边界的小型化宽频蝶形天线

利用Minkowski分形边界结构,设计了一款面向全球定位系统应用的宽频带蝶形天线.通过对不同迭代次数的分形天线进行仿真对比,选取2次迭代的分形结构设计了工作于GPS波段的蝶形天线,加工制作出该天线并对其进行测试,测试结果和仿真结果吻合较好,从而验证了设计方法的正确性.与具有相同谐振频率的方形贴片天线相比,该天线面积缩减了约28.7；,这说明分形结构的空间填充性可以用来增加天线辐射单元的有效电长度,实现天线的小型化设计,而且分形结构的引入对天线的方向图特性没有影响.

The Compact Wideband Bow-Tie Antenna Based on Minkowski-Like Sided Fractal

A novel Minkowski sided fractal structure has been applied to design a wideband bow-tie antenna for global positioning system(GPS)application.The performances of the fractal antennas with various iterations are compared and the second iteration version of the Minkowski sided fractal antenna for GPS application is designed,fabricated and tested.The measured and simulated results are provided and the good agreement verifying the validity of this design method.The proposed 2 Minkowski sided fractal antenna provides an area reduction of 28.7% as compared with the reference bow-tie antenna with same resonance frequency.That is to say,the space-filling property of fractal geometry can be utilized to increase the effective electrical length for miniaturization.Meanwhile,it does not degrade the performance of the antenna.