一种宽波束圆台型双频微带天线的设计与实现

Design and Implementation for Wide-beam and Dual-band Microstrip Antenna with the Truncated Cone Ground

设计了一种应用于车载型卫星接收机的双频双圆极化多层圆台型微带天线,通过在微带天线中加入圆台型地面结构,仿真结果表明:在保证天线工作在S频段波束宽度和低仰角增益满足使用要求的同时,工作在L频段时,与不加圆台结构的天线相比,H面3dB波束宽度提高了24.7°,低仰角增益(仰角为10°)提高了0.6dBi;E面3dB波束宽度提高了35.1°,低仰角增益(仰角为10°)提高了0.5dBi.该天线结构简单,是一种比较实用的车载卫星接收机收发天线。

A dual-band and dual circular polarization multilayer microstrip antenna with the truncated cone ground for automobile satellite communication transmitter and receiver is designed in the paper. Simulation results show the beam width is widened and low-angle radiation is enhanced on S band, and on L band, compared to conventional antenna, the 3 dB beam width improved by 24.7° on H and 35.1° on E, the low-angle radiation（10°） improved by 0. 6 dBi on H and 0.5 dBi on E. The structure of the antenna is simple. It is practical to be used as an antenna for automobile satellite communication transmitter and receiver.