Journal of Systems Engineering and Electronics ›› 2010, Vol. 21 ›› Issue (1): 37-40.doi: 10.3969/j.issn.1004-4132.2010.01.007

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Fast and accurate analysis of electromagnetic scattering from targets situated in dielectric half space

Yongpin Chen∗, Zaiping Nie, and Jun Hu   

  1. School of Electronic Engineering, University of Electronics Science and Technology of China, Chengdu 610054, P. R. China
  • Online:2010-02-26 Published:2010-01-03
  • Supported by:

    This work was supported by 111 Project (B07046).


Electromagnetic scattering from targets situated in half space is solved by applying fast inhomogeneous plane wave algorithm combined with a tabulation and interpolation method. The integral equation is set up based on derivation of dyadic Green’s functions in this environment. The coupling is divided into nearby region and well-separated region by grouping. The Green’s function can be divided into two parts: primary term and reflected term.
In the well-separated region, the two terms are both expressed as Sommerfeld integral, which can be accelerated by deforming integral path and taking interpolation and extrapolation. For the nearby region, the direct Sommerfeld integral makes the filling of impedance matrix time-expensive. A tabulation and interpolation method is applied to speed up this process. This infinite integral is pre-computed in sampling region, and a two-dimensional table
is then set up. The impedance elements can then be obtained by interpolation. Numerical results demonstrate the accuracy and efficiency of this algorithm.