摘要
运用复阻抗劈绕射理论，分析、计算了带阻抗围边的成形双镜天线辐射图．结果表明，在双镜天线主、副镜面边缘附加两条宽度很窄的两面阻抗锥形环带，即可实现天线旁瓣电平的显著下降，与不带阻抗围边时的旁瓣电平的比较，降低约５～１５ｄＢ．
The depression of the sidelobes of dual-reflector antennas has been an important field of satellite communication in recent years.The fields in sidelobe regions of the antenna are most from the edge diffraction of main-and sub-reflector.In this paper,the radiated fields of the shaped dual-reflector antenna with impedance flanges are analysed and calculated by using the theory of diffraction of the complex impedance wedge. It has been shown that the sidelobe level of the antenna are droped essentially by virtue of two face impedance conical loop stripes with narrow widths attached to the main-and sub-reflector at their edges respectively.Its sidelobe level is about 5～15 dB lower than that without impedance flanges.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1994年第6期84-95,共12页
Journal of Shanghai Jiaotong University
关键词
成形双镜天线
阻抗围边
辐射场
辐射图
shaped dual-reflector antennas,impedance flanges,computation of radiated fields
