摘要
在卫星通信、定位设备中,为了迅速完成定位和通信功能,一般要求天线具有较大的波瓣宽度和较好的低仰角增益。研究设计了一种具有良好低仰角增益的宽波束圆极化四臂螺旋天线,该天线在上半空间的增益分布十分均匀,10°仰角的增益相对峰值增益下降不超过3dB。为了改善天线的轴比性能,提出了一种4臂等幅、相位依次相差90°馈电的天线方案,仿真结果表明,这种天线的增益特性和轴比特性都得到了较大的改善。
The antenna used for satellite position and communication system usually needs a wide beam and a good gain performance at low elevation. A quadrifilar helix antenna with good radiation property is designed, and a scheme of feed source with the same four feed ports and the phase difference 90 degree between two ports is proposed. The simulation results show that the antenna has a good performance of axial ratio and gain pattern.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第2期340-343,共4页
Chinese Journal of Radio Science
关键词
四臂螺旋天线
圆极化
轴比
quadrifilar helix antenna
circular-polarization
axial ratio
