基于近场旋转技术的共形阵列天线方向图高效计算方法  

An Efficient Method for Calculation of Patterns of Conformal Array Antennas Based on Near-field Rotation Technique

作　　者：赵黎 程友峰 廖成[1] 彭樊 丁霄[2] ZHAO Li;CHENG Youfeng;LIAO Cheng;PENG Fan;DING Xiao(Institute of Electromagnetic Field and Microwave Technology,Southwest Jiaotong University,Chengdu 610031,China;Institute of Applied Physics,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031 [2]电子科技大学应用物理研究所,成都610054

出　　处：《微波学报》2024年第2期14-21,34,共9页Journal of Microwaves

基　　金：国家自然科学基金面上项目(62271416);国家自然科学基金青年项目(61901398);四川省自然科学基金(2022NSFSC0494);四川省科技厅项目(2021YJ0361)。

摘　　要：文中提出了一种基于近场旋转技术的新型共形阵列天线方向图快速计算方法。首先,首次根据共形载体信息对单个特定天线单元近场封闭表面上的电场、磁场和采样点位置进行坐标旋转变换,进而得到其在全局坐标系下近场封闭面上的电场和磁场。然后,基于谢昆诺夫等效原理计算单个天线单元的等效电流和磁流及其所产生的辐射场,并遍历共形阵所有单元计算其在全局坐标系下的辐射场。进一步地,将全局坐标系下所有单元方向图进行矢量叠加得到共形阵列天线的远区总场。最终,通过两个具有不同载体平台与不同阵元的共形阵列天线方向图算例,并与全波仿真以及基于远场旋转技术的计算方法相比较,验证了所提出方法相较于远场旋转技术在计算精度与效率上的优势。In this paper,a novel and efficient method for calculation of patterns of conformal array antennas based on a near-field rotation technique is presented.Firstly,based on the information of conformal carriers,the proposed solution rotates the electric fields,magnetic fields,and position of sampling points on a specific near-field closed surface of a single antenna element.The electric and magnetic fields on the surface in the global coordinate system are further obtained.Then,the equivalent electric and magnetic current densities of the above single element and radiation fields generated by them can be calculated based on the Schelkunoff′s equivalence principle.Furthermore,radiation fields of all elements in the global coordinate system can be obtained in the same way.Afterwards,the total far fields of the conformal array antennas can be calculated as a vector superposition of patterns of all elements in the global coordinate system.Finally,two numerical examples regarding to the pattern calculations of conformal array antennas with different carrier platforms and array elements are provided for the validation.Compared with results based on the full-wave simulation and of the reported far-field rotation technique-based method,the proposed solution has the advantages in calculation accuracy and efficiency simultaneously.

关 键 词：共形阵列 阵列方向图计算 近场旋转技术 谢昆诺夫等效原理 

分 类 号：TN820.12[电子电信—信息与通信工程]