基于北斗卫星导航系统的一种圆极化微带天线  

Circularly Polarized Microstrip Antenna with Slots for Beidou (Compass) Navigation System

作　　者：田晓青[1] 刘少斌[1] 张学勇[1] 周良[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《信息化研究》2011年第2期22-24,28,共4页INFORMATIZATION RESEARCH

摘　　要：介绍一种用于北斗卫星导航系统的圆极化微带天线。该天线的主辐射器由开槽的圆形贴片构成,采用单点的同轴馈电,设计的中心工作频率为2.492GHz。仿真结果显示,调节圆形贴片中开槽的长度,可以分离出简并模,激励两个正交的模式,当两个分量相位为90deg,可以实现圆极化。实际测试中,|S11|小于-10dB的阻抗带宽为0.09GHz,3dB轴比带宽为0.033GHz,与仿真结果基本吻合。A single layer, single-feed circularly polarized （CP） microstrip antenna designed with four slots equally spaced and inset at the boundary of the circular patch for Beidou （Compass） navigation system is proposed. The proposed antenna operates at the frequency of 2.492 GHz. The simulation results shown that by simply tuning the lengths of the slotted pairs, two orthogonal near-degenerate resonant modes for CP radiation can be excited. The measured impedance bandwidth corresponding to ｜S11｜ less than-10 dB of 0.09 GHz and the 3 dB axial ratio （AR） bandwidth of 0.033 GHz have been achieved for the antenna. The simulation and measured results meet well.

关 键 词：开槽微带天线 圆极化 北斗导航系统 

分 类 号：TN957[电子电信—信号与信息处理]