摘要
构建了一种类似于Koch分形的带有方形锯齿结构的微带贴片天线,通过在微带贴片天线两侧加方形锯齿来研究微带贴片天线的辐射特性。随着分形阶数及所加方形锯齿数的增加,微带贴片天线表现出各种不同的特性。当所加方形锯齿达到一定数量时,微带天线可抑制高次谐波的干扰。通过Hfss13.0软件仿真得到了分形天线的反射系数s11参数、电压驻波比及辐射方向图等,这些参数表明,当分形阶数为1,2时,天线具有倍频作用,当分形阶数为10～20时,天线具有明显的抑制高次谐波的能力。最后,对10阶分形天线进行了实物加工与测量,实验结果与仿真结果吻合较好。
A kind of microstrip patch antenna that similar to Koch fractal structure with a square notched struc- ture was fabricated. Through adding square notched structure on both sides of microstrip patch antenna to study the radiation property. Along with the increase of fractal order number and the square notch number, the microstrip patch antenna shows various features. When the number of the square notch adds to a certain amount, the micros- trip patch antenna can suppress the high harmonic interference. The reflection coefficient sll, voltage standing wave ratio and radiation pattern of the fractal antenna have been obtained using Hfssl3.0 software. The results proved that when the fractal order number is 1, 2, the antenna have a role of frequency multiplication; while the fractal or- der number is 10-20, the antenna can suppress the interference of higher harmonic. Finally, a 10 order fractal anten- na has been fabricated and measured. The experimental results and simulation results have a good agreement with each other.
出处
《压电与声光》
CSCD
北大核心
2013年第5期759-762,共4页
Piezoelectrics & Acoustooptics
