一种具有宽带宽角特性的改进型准八木天线

A novel quasi-Yagi antenna with broad-band and broad-angle characteristics

摘要:

准八木天线是由巴伦、辐射单元和引向器构成的一种微带天线，文中提出了一种具有宽带、宽角特性的改进型准八木天线。通过CST仿真分析软件，对振子双臂后折和利用矩形微带贴片对辐射单元进行改进的微带贴片式准八木天线进行仿真分析，仿真和实测结果显示，微带贴片式准八木天线在带宽达到40%频带内(8 GHz~12 GHz)，驻波比(VSWR)≤2，3 dB的波束宽度均能达到120°以上。

Abstract:

A novel quasi-Yagi antenna was proposed with broad-band and broad-angle characteristics. CST microwave studio, high frequency structure simulation software based on Finite Integration Method(FIM)，were used to analyze the antenna performances. Two methods to extend beam width were simulated，and the method of adding rectangle microstrip patches as radiating element was selected at last. After being optimized with simulation software，the results of the modified quasi-Yagi show more than 120°beam width both in E-and H-plane and a relative bandwidth about 40% for Voltage Standing Wave Ratio(VSWR) of less than 2.