一种易调谐的小型GPS微带天线设计

摘要

A new and easy tuning compact GPS microstrip antenna structure has been proposed. RHCP( right-hand circular polarized) radiation is realized with corner truncated on a square patch as the radiating element. The size of the antenna is reduced by cutting central slot and marginal slits, which force the current to follow extra paths. Coaxial feeding loaded microstrip matching section is used to achieve impedance matching. The design method of the antenna is given. The designed antenna has been fabricated and measured after a large of electromagnetic simulations. The simulated and measured results show that the antenna has a good matching and CP radiation performance. The antenna has good prospects for the applications because it is compact and easy tuning.%提出了一款新颖的易调谐小型GPS微带天线结构.采用正方形贴片作为辐射单元,通过切角微扰实现右旋圆极化辐射；在贴片中心开槽和四周开缝,利用贴片曲流技术减小天线的尺寸；使用同轴中心馈电加载微带匹配段,实现阻抗的匹配.文章给出了天线的设计思路,并进行了大量的电磁仿真优化,最终对天线进行了加工实验.实验结果表明,在设计的频带内,天线具有较好的阻抗匹配和圆极化辐射特性.该天线具有结构紧凑、易于调谐的特点,具有良好的应用前景.