摘要
对Koch岛分形天线的基模和高次模进行了研究,研究表明:Koch岛分形天线高次模和基模都具有良好辐射性能,且两种模式频比可达3.7∶1。对于基模,电流分布在天线的中间区域;对于高次模,电流在分形不规则的边界形成强烈谐振,可以产生超强方向性的辐射,使天线增益高达10.8dB。通过HFSS和CST两种不同算法软件的计算结果对比,验证了该研究方法,为实现高性能的双频段大频差天线提供了一种可行思路和结构。
The fundamental mode and the high-order mode of a Koch island fractal antenna have been studied.The study shows that,both the fundamental mode and the high-order mode have good radiation performance and the frequency ratio of the two modes can be more than 3.7∶1.For the fundamental mode,the current concentrated in the middle area of antenna,and for the high-order mode,the current is strongly resonant in high irregularity of the fractal boundary,and the high-order mode displays the super directive,and the directive of the high-order mode can reach to 10.8 dB.The method has been verified by comparing HFSS results with CST’s.Our study shows that the Koch island can provide a feasible structure for realizing high performance antenna at two very different frequencies.
出处
《制导与引信》
2013年第1期40-44,共5页
Guidance & Fuze
关键词
分形天线
双频段
频比
fractal antenna
dual-frequency band
frequency ratio
