中文摘要：

为了改善微带天线的带宽性能，提出了一种新颖的展宽圆极化微带天线带宽的设计方法．该方法使用同轴中心馈电方式并加载微带匹配段实现阻抗匹配，贴片四周加载四个连续旋转放置的开口谐振环，并在地板中心嵌入一个缺陷地结构，实现了微带天线阻抗带宽和轴比带宽的展宽．实验结果表明，阻抗带宽和轴比带宽分别提高了68．2％和56．6％．

英文摘要：

In order to improve the performance of the bandwidth of the microstrip antenna ,a novel method for broadening bandwidth of the circularly polarized microstrip antenna is presented . Coaxial feeding loaded microstrip matching section is used to achieve impedance matching . The impedance and the axialratio bandwidths are improved by placing four sequentially rotated split‐ring resonators around the patch of the antenna and embedding a defeated ground structure on the center of the ground plane . Experimental results show that the impedance and the axialratio bandwidths of the antenna are increased by 68 .2% and 56 .6% ,respectively .