一种高介GPS微带天线的设计与研究

摘要

An improved circularly polarized micro-strip antenna is proposed. A kind of high permittivity sintered microwave material was used as the antenna s dielectric substrate, the proposed antenna was fed by a single spot with SMA coaxial connector. The antenna is much smaller, and the structure is simple. Simulation analysis shows that the antenna has nice s(1, 1) bandwidth and axial-ratio bandwidth. At last, the impact of thickness and loss tangent of dielectric substrate on the antenna are investigated.%针对传统GPS天线体积较大的问题,提出了一种改进的圆极化微带贴片天线,该天线用高介电常数的陶瓷作为天线基板,采用单端口背馈方式馈电,缩小了天线尺寸,结构简单.通过仿真优化,获得了比较好的阻抗带宽和轴比带宽,并以此为基础研究了介质基板厚度及损耗对天线性能的影响,为GPS微带天线设计提供一种思路.