一种小型化北斗导航终端圆极化天线的设计

Design and Simulation of Circularly Polarized Antenna for Miniaturized Beidou Navigation Terminals

设计了一款单馈电的小型圆极化微带天线。在方形贴片上,通过切角和对称开槽的方法,天线获得了良好的右旋圆极化性能,并实现了小型化设计。借助HFSS电磁仿真软件,对天线参数进行了仿真和分析。仿真结果表明,S11<-10 d B的阻抗带宽为82 MHz,3 d B圆极化轴比带宽为12 MHz,较好地满足了北斗接收天线的设计要求。该设计具有方法简单、易于实现、成本较低等优点,且具有良好的应用前景。

A miniature single feed micro-strip antenna of circularly polarization is designed. The antenna achieves good right-hand-circular polarization and the miniaturization design by truncated corners and slotting symmetrically on the square patch. The antenna parameter is simulated and analyzed through HFSS electromagnetic simulation software. The simulation result shows that the impedance bandwidth is 82 MHz when the return loss is less than - 10 dB and the bandwidth of 3 dB polarization axial ration is 12 MHz, meeting the requirements of Beidou naviga- tion receiving antenna. The design has the advantages of simple design, easy implementation, and low cost with good prospects.