改进型IE-FFT结合物理光学的宽带分析方法

发布时间：2018-11-12 08:14

【摘要】：将物理光学方法与改进型积分方程-傅里叶变换方法相结合,通过引入基于Stoer-Bulirsch(SB)算法的自适应有理插值技术,快速分析电大载体平台上天线的宽带辐射特性.首先,提出基于子域快速傅里叶变换(FFT)的改进型单层FFT算法对格林函数插值,通过引入空组概念,加速迭代求解中的矩阵与矢量相乘计算,减少矩阵求解存储量,避免了对插值不准确的近场进行修正.同时,对于电流频率响应,根据SB算法的循环准则,利用阶数可变的有理函数作为替代模型,实现频域插值的快速计算.基于以上的改进,混合算法在频域分析时不仅减少了矩阵方程中未知量的个数,同时大大降低了内存需求和计算时间.数值结果表明,该方法可以快速有效地分析大型载体平台上天线的宽带特性.
[Abstract]:The physical optics method is combined with the improved integral equation-Fourier transform method. By introducing the adaptive rational interpolation technique based on the Stoer-Bulirsch (SB) algorithm, the wideband radiation characteristics of the antenna on the electrically large carrier platform are analyzed quickly. Firstly, an improved monolayer FFT algorithm based on subdomain fast Fourier transform (FFT) is proposed to interpolate Green's function. By introducing the concept of empty group, the matrix and vector multiplication in iterative solution is accelerated, and the storage capacity of matrix solution is reduced. The correction of inexact interpolation in near field is avoided. At the same time, according to the cycle criterion of SB algorithm, the variable order rational function is used as the substitute model to realize the fast calculation of frequency domain interpolation. Based on the above improvements, the hybrid algorithm not only reduces the number of unknown variables in the matrix equation, but also greatly reduces the memory requirement and computing time in frequency domain analysis. Numerical results show that this method can quickly and effectively analyze the wideband characteristics of antennas on large carrier platforms.
【作者单位】：西安电子科技大学天线与微波技术重点实验室;中国电子科学研究院;
【基金】：国家自然科学基金资助项目(61201023) 新世纪优秀人才支持计划资助项目(NCET-11-0690) 高等学校博士学科点专项科研基金资助项目(20120203120011)
【分类号】：TN820

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