加载式混合分形天线及其应用

Loaded Hybrid Fractal Antenna and Its Appication

将分形几何应用于天线设计可以产生具有多频段或小型化特征的分形天线。传统的多频段分形天线Sierpinski垫片天线由于是有限次迭代生成的,它存在截取效应低端谐振频率比值几乎是其几何相似性因子的两倍,从而限制了其实际应用。本文提出了一种Koch分形加载Sierpinski垫片天线,该天线采用了新型加载技术并充分利用Koch分形的空间自填充能力,结果表明它有比传统Sierpinski垫片天线低得多的高端谐振频率,从而实现了小型化的多频段Sierpinski垫片天线。

Fractal geometry can be applied to antenna design to achieve multi-band or miniaturized fractal antennas. Traditional multi-band fractal antenna-Sierpinski gasket antenna can be obtained through a finite number of iterations with a result of truncation effect, leading to a ratio of lower resonant frequencies almost twice of its geometry similarity factor, which limits its practical application. A Koch fractal loaded Sierpinski gasket antenna is proposed in this paper, it adapts new loading technology and makes full use of the space-filling capability of Koch line. The results indicate that this loaded hybrid fractal antenna has much smaller upper resonant frequencies than traditional Sierpinski gasket antenna, making the miniaturized multi-band Sierpinski gasket antenna come true.