The RFG-FFT Based on Modified Dislocated Grids Scheme

XIE Jia-ye; PANG Li-li; QIAN Xiao-xia; LU Song-yu

doi:10.3969/j.issn.0372-2112.2017.10.013

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The RFG-FFT Based on Modified Dislocated Grids Scheme

更新时间：2025-07-16

- The RFG-FFT Based on Modified Dislocated Grids Scheme
- Acta Electronica Sinica Vol. 45, Issue 10, Pages: 2402-2408(2017)
- 作者机构：
  
  1. 南京工程学院工业中心,江苏,南京,211167
  2. 东南大学毫米波国家重点实验室,江苏,南京,210096
  3. 南京工程学院工业中心,江苏,南京,211167
  4. 东南大学毫米波国家重点实验室,江苏,南京,210096
- 作者简介：
- 基金信息：
  
  Natural Science Research Foundation of Colleges and Universities of Jiangsu Province (No.15KJB510014);Doctoral Research Foundation of Nanjing Institute of Technology (No.YKJ201443, No.YKJ201444);Open Fund of State Key Laboratory of Millimeter Waves, Southeast University (No.K201718)
- DOI：10.3969/j.issn.0372-2112.2017.10.013
  CLC： TN011
- Published Online：25 October 2017，
  
  Published：2017
- 稿件说明：
移动端阅览
XIE Jia-ye, PANG Li-li, QIAN Xiao-xia, et al. The RFG-FFT Based on Modified Dislocated Grids Scheme[J]. Acta Electronica Sinica, 2017, 45(10): 2402-2408.
DOI：

XIE Jia-ye, PANG Li-li, QIAN Xiao-xia, et al. The RFG-FFT Based on Modified Dislocated Grids Scheme[J]. Acta Electronica Sinica, 2017, 45(10): 2402-2408. DOI： 10.3969/j.issn.0372-2112.2017.10.013.

摘要

本文提出了修正的交错网格方案结合基于快速傅里叶变换（FFT）的算法，用于减少快速算法中近场修正矩阵的计算负担.该方案首先使用两套交错的网格分别用于场点和源点的投影，其后为了进一步提高拟合精度，对部分网格间的格林函数值进行了修改.实验表明将提出的方案与实系数拟合格林函数FFT方法结合，提高了近场拟合元素的精度，因此减少了近场修正矩阵中元素的个数.从而，新的方案降低了总的内存需求和计算时间.

Abstract

In this paper a modified dislocated grids scheme combined with the FFT-based method is proposed to reduce the burden of the near correction matrix.The scheme first adopts two sets of dislocated Cartesian grids that are respectively applied to projections of the field points and the source points.Then parts of Green's function values are modified for further improving the accuracy of fitting.When the proposed scheme is applied to the Real coefficients Fitting Green's function Fast Fourier Transformation

the number of near correction elements is reduced.Compared with the traditional uniform grid scheme

the new scheme has lower total memory requirement and higher calculation speed.

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