摘要
X波段圆极化雷达天线由波导窄边裂缝线阵、波纹喇叭及极化栅等部件组成。采用扼流槽加极化块的方法,抑制交叉极化瓣,取得了较好的效果。圆极化的实现,采用非常规极化栅的方法。经过仿真计算和试验优化,在确保其他技术指标的前提下,该天线在3%的较宽频段内轴比优于1.5 dB。
Development of an X-band circular polarized antenna for radar is introduced in this paper, which is composed of a linear slot array on waveguide narrow wall, a corrugated horn and a polarization grid. Adopting technology of choke grooves and polariza- tion blocks, suppression of cross polarized lobes is satisfactorily obtained. Putting to use method of non-conventional polarization grid, we realized circular polarization of the antenna. Results of simulation and experimental optimization, under condition of heep- ing other technical specification unchanged, show that the antenna axial ratio is lower than 1.5 dB for relative bandwidth of 3 %.
出处
《现代雷达》
CSCD
北大核心
2009年第8期62-65,共4页
Modern Radar
关键词
圆极化天线
极化栅
轴比
交叉极化瓣
circular polarization antenna
polarization grid
axle ratio
cross polarization lobe
