一种新型分形微带天线的仿真优化

摘要

Research fractal microstrip antenna optimization. Aimed at multiband communication, muntiband return loss character is required . Traditional fractal antenna has simple structure and is lack of multiband performance. A novel three—band fractal microstrip antenna was proposed using Cantor set and Koch curve theory, which is suitable for TD-SCDMA, WiMax and WLAN wireless communication. Conduction bands in different length and width were established and the stub lines of narrow conduction bands were converted to Koch curves. A prototype was simulated and optimized on CST software and fabricated. Simulated return loss of the antenna and radiation patterns was presented. The return loss was measured and good agreement between measurement and simulation was achieved. The experiment proves that the the antenna can satisfy the multiband communication demand.%研究分形微带天线优化问题,针对多频通信需求,要求回波损耗特性实现多频性.传统分形天线结构单一、多频性能差.为了改善其多频特性,利用Cantor集和Koch曲线原理,通过建立不同宽度和长度的导带模型,并将导带宽度较窄的短截线替换为Koch曲线,提出了一种新型的适合TD-SCDMA、WiMax及WLAN的无线通信的三频段分形微带天线.利用CST软件进行仿真,得到了天线仿真回波损耗及方向图,并实测了回波损耗,实测结果与软件仿真结果吻合较好.经实验证明,所设计的天线能很好满足多频通信的需求.