文章设计出了一种共面波导馈电的宽带圆极化缝隙微带天线。该天线通过共面波导(CPW)端口伸出的激励条带和矩形缝隙侧边的枝节实现圆极化辐射,通过矩形槽以及激励条带和微扰枝节的渐变设计,拓宽了阻抗带宽。借助于仿真软件对天线参数进行优化设计,并在此基础上制作了实物。测试结果表明,所设计天线驻波比(VSWR)小于2的带宽达到89.7%,轴比(AR)小于3 dB的带宽达到21.2%,满足了多种场合的使用需求。 The paper designs a coplanar waveguide fed wideband circularly polarized slit microstrip antenna. The antenna radiates circularly polarized radiation through the excitation strips extending from the Coplanar Waveguide (CPW) port and the stubs on the sides of the rectangular slit. The impedance bandwidth is broadened through the rectangular groove and the gradual design of the excitation stripes and perturbation branches. With the help of simulation software, the antenna parameters are optimized and the physical objects are made on the basis of this. The test results show that the bandwidth of less than 2 VSWR is 89.7% and the bandwidth of less than 3 dB of AR is 21.2%, which meets the requirements of many occasions.