一种新型共面波导馈电宽带圆极化印刷天线  

Novel Design of CPW-fed Broadband Circularly Polarized Printed Antenna

作　　者：贾建新[1] 卢春兰[2] 杨杰[3] 李占猛[3] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院卫星通信系 [3]解放军理工大学通信工程学院研究生3队

出　　处：《军事通信技术》2011年第4期79-82,共4页Journal of Military Communications Technology

摘　　要：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 design of CPW-fed broadband circularly polarized printed antenna was presented.The antenna was fed by coplanar waveguide,and the ground slotted in rhombus shape.By adjusting the lengths and widths of the two orthogonal stubs embedded in the microstrip feeding-line,the proposed antenna excites two orthogonal resonant modes with equal amplitude and 90°phase difference for CP radiation.An antenna was fabricated based on simulation and optimization.The measured results show that the 3 dB axial ratio bandwidth and the bandwidth with S_（11）-10 dB are 11.3%（270 MHz） and 14.21%（338 MHz） respectively.

关 键 词：共面波导馈电 宽带 圆极化 印刷天线 

分 类 号：TN823[电子电信—信息与通信工程]