基于微波成像的角锥喇叭天线宽带电磁散射特性研究  

Study on the Wide-band Scattering Characteristics of Pyramidal Horn Antenna based on Microwave Imaging

作　　者：杨元胜 陆波 李晨 崔璨 朱逸飞 YANG Yuansheng;LU Bo;LI Chen;CUI Can;ZHU Yifei(Shanghai Electro-Mechanical Engineering Institute,Shanghai 201109,China)

机构地区：[1]上海机电工程研究所

出　　处：《空天防御》2019年第4期13-18,31,共7页Air & Space Defense

摘　　要：考虑到喇叭天线作为一种宽带天线的典型性和通用性,本文研究了X波段标准增益角锥喇叭天线近轴方向宽带目标电磁散射特性。使用宽频带平面电磁波照射短路状态的角锥喇叭天线,对单站频域散射数据进行微波一维距离向成像,得到结构项和模式项散射中心精确的强度分布并且分析角锥喇叭天线的散射机理。同时,本文还研究了喇叭天线波导长度和电磁波极化情况对一维成像的影响,并结合角域散射数据得到了更具有整体性的二维像。本文的研究成果为喇叭天线目标特性的研究提供了最直接、有用的信息,也为进一步理解其他宽带天线的电磁散射机理奠定了基础。In consideration of the typicality and generality of the horn as a wide-band antenna,the paraxial wide-band electromagnetic scattering characteristics of X-band standard gain pyramidal horn is studied.By using wide-band plane electromagnetic wave to irradiate the pyramidal horn antenna in short-circuit state,a one-dimensional range microwave image is obtained based on monostatic frequency domain scattering data.The accurate intensity distribution of the antenna structural and mode scattering center is received from the imaging,and the scattering mechanism of the pyramidal horn is analyzed.And the effect of waveguide length and the polarization of the horn antenna are discussed,and a more holistic two-dimensional microwave image is obtained with the angular domain scattering data.These results provide the most direct and useful information for the research of target characteristics of the pyramidal horn antenna and lay the foundation for understanding the scattering mechanism of horn antenna and other wide-band antennas.

关 键 词：喇叭天线 结构项 模式项 微波成像 

分 类 号：TN959.21[电子电信—信号与信息处理]