连续旋转馈电微带天线阵的仿真

Simulation of Sequentially Rotating Fed Circularly Polarized Microtrip Antenna

针对微带阵列天线实现圆极化时轴比窄的不足,引入了一种给微带单元连续旋转馈电的技术,并从圆极化天线的定义出发,采用一种浅显的表述对此技术如何可以提高轴比特性进行了理论分析,得出关于此种阵列结构的一些规则。最后,在2.49GHz工作频率上,对两种微带阵列结构的天线进行了仿真计算,结果表明了此种阵列天线比传统的阵列天线阻抗带宽增加2倍,轴比带宽增加了几乎3倍。

The technique of sequentially rotating the feed position to improve the circular polarization bandwidth of an array was introduced, According to the conception of CP antenna, the theory to widen axial-ratio bandwidth was interpreted in a simpler way and some rules to design the array were got. Finally, at 2.49GHz, two kinds of array were designed and simulated. Results present that the array using this technique can get 2 times impedance bandwidth and almost 3 times axial-ratio bandwidth of the traditional array.