Analysis of Microwave Inverse Scattering Using the Broadband Electromagnetic waves

광대역 전자파를 이용한 역산란 해석 연구

  • Lee, Jung-Hoon (RF&Antenna Laboratory, Depart of Communication Eng. Myong-Ji University) ;
  • Chung, Young-Seek (RF&Antenna Laboratory, Depart of Communication Eng. Myong-Ji University)
  • 이정훈 (명지대학교 통신공학과 RF 및 Antenna 연구실) ;
  • 정용식 (명지대학교 통신공학과)
  • Published : 2005.11.05

Abstract

In this paper, we proposed a new algorithm of the inverse scattering for the reconstruction of unknown dielectric scatterers using the finite-difference time-domain method and the design sensitivity analysis. We introduced the design sensitivity analysis based on the gradient for the fast convergence of the reconstruction. By introducing the adjoint variable method for the efficient calculation, we derived the adjoint variable equation. As an optimal algorithm we used the steepest descent method and reconstructed the dielectric targets using the iterative estimation. To verify our algorithm we will show the numerical examples for the two-dimensional $TM^2$ cases.

Keywords

inverse scattering;Design sensitivity;optimization