用于多模卫星导航信号接收的半球形阿基米德螺旋天线

Hemispherical Archimedean Spiral Antenna for Multi-mode Satellite Navigation Signals Receiving

平面阿基米德螺旋天线具有双向辐射特性,在实现单向辐射时会降低效率。将平面阿基米德螺旋天线共形到局部半球上可以得到一种新型结构的半球形阿基米德螺旋天线,分析了这种天线的结构特点,进行了仿真与实验,研究结果表明,在覆盖多模卫星导航信号工作频率的1.1-1.7GHz频段内,反射损耗小于-10dB,增益大于3.9dB,前后比大于3.6dB,相位中心稳定度小于2mm,可满足宽频带圆极化多模卫星导航共用接收天线的设计要求。

Planar Archimedean spiral antenna has the property of bidirectional radiating, the radiation efficiency will fall down when it realizes unidirectional radiation. By conforming the planar Archimedean spiral antenna to a hemisphere, a new type of Archimedes spiral antenna is manufactured, in this work, structural characteristics of the antenna has been analysed, and simulations and experiments have been curt＇led out. The results show that in the range of 1.1 - 1.7 GHz which covers the satellite navigation signal frequency band, the reflection loss is less than - 10 dB, gain is more than 3.9dB, front-back ratio of the antenna is more than 3.6 dB, DEV is less than 2 ram, this antenna may satisfy the requirements of the wide-band multi-mode circular polarization satellite navigation receiving antenna.