设计了一种结构新颖的共面波导(CPW)馈电宽带圆极化印刷天线。天线采用共面波导馈电,接地板开有方形缝隙,馈电微带线上加载两个长短不一的正交枝节,通过调节两正交枝节的长度和宽度,激励出一对振幅相等、相位相差90°的正交模,从而使天线辐射圆极化波。在软件仿真优化设计的基础上对天线进行了实际加工和测量,测量结果表明,天线的3 dB轴比带宽达到11.3%(270 MHz),S_(11)<-10 dB的阻抗带宽达到14.21%(338MHz)。 A novel CPW wideband circular polarized printed antenna was designed. The antenna adopts coplanar waveguide feed, the ground plate has a square gap, and the feeding microstrip line loads two orthogonal branches with different lengths. By adjusting the lengths and widths of the two orthogonal branches, an amplitude equal to one is excited, 90 ° phase difference between the orthogonal mode, so that the antenna radiating circularly polarized waves. The antenna was processed and measured on the basis of the software simulation optimization design. The measurement results show that the antenna bandwidth of 3 dB axis reaches 11.3% (270 MHz) and the impedance bandwidth of S 11 (<10 dB) reaches 14.21% (338MHz).