基于圆环缝隙结构的左旋圆极化天线设计

摘要

本文就圆环缝隙结构的圆极化天线进行理论分析，提出在微带天线接地板上添加十字形槽以拓展天线带宽的方法，并设计出左旋圆极化可重构微带天线.对比仿真结果，添加十字形槽的圆极化天线的阻杭带宽为4.45到5.50 GHz.在4.75到5.45 GHz范围内这种方法能在不显著增加天线体积的情况下，将天线带宽增加一倍。%Based on the theoretical analysis of the circular polarization of the ring slot structure, the method of adding across slot in the antenna was proposed to widen antenna's bandwidth. And a left hand circular polarization(LHCP) was designed by using this method. By comparing between the simulation result it proves that adding a cross slot in the reconfigurable antenna can make its impedance bandwidth reach 4.45-5.50 GHz above. In the range of 4.75 GHz to 5.45 GHz, the measured result proves that the AR bandwidth is 14%. The method can double the antenna bandwidth without increasing the antenna size.