摘要
设计了一种高功率微波双波段同轴馈源,从理论分析和数值仿真两方面进行了验证。它采用同轴结构馈电,C波段的工作中心频率为4.15 GHz,利用加入轴向波纹的圆波导结构馈电;L波段的工作中心频率为1.75 GHz,利用同轴波导馈电。通过调整外筒半径的大小,可有效抑制低频段高阶模的传输,同时径向波纹结构可有效改善高频段微波的辐射特性。利用模式匹配法和组合散射矩阵理论对馈源结构进行了分析,理论计算和数值仿真结果具有良好的一致性,所设计的双波段馈源结构紧凑,副瓣电平低,E面和H面方向图等化特性良好。
A dual-band coaxial horn feed applied in the field high power microwaves is proposed with theoretical analysis and numerical simulation.It is fed by circular waveguide with horizontal corrugations at 4.15 GHz and by coaxial waveguide at 1.75 GHz.Unwanted higher order modes at low frequency can be limited effectively by reducing the outer radius of the coaxial waveguide,and vertical corrugations located at the coaxial waveguide can improve radiation characteristics at high frequency effectively at the same time.With mode matching theory determining the scatter matrix of the feed,the theoretical results and simulation results agree well with each other.It is shown that the dual-band horn feed is compact with low side lobes and azimuthally symmetrical radiation patterns.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2011年第1期146-150,共5页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
湖南省高校科技创新团队基金项目
关键词
高功率微波
同轴馈源
双波段
模式匹配法
模式展开法
high power microwave
coaxial feed
dual-band
mode matching theory
mode expansion theory
