A New Approach for Solving Inverse Scattering Problems with Overset Grid Generation Method
Abstract: This paper presents
a new approach of Forward-Backward Time-Stepping (FBTS) utilizing
FiniteDifference Time-Domain (FDTD) method with Overset Grid Generation (OGG)
method to solve the inverse scattering problems for electromagnetic (EM) waves.
The proposed FDTD method is combined with OGG method to reduce the
geometrically complex problem to a simple set of grids. The grids can be
modified easily without the need to regenerate the grid system, thus, it
provide an efficient approach to integrate with the FBTS technique. Here, the
characteristics of the EM waves are analyzed. For the research mentioned in
this paper, the ‘measured’ signals are syntactic data generated by FDTD
simulations. Whilethe ‘simulated’ signals are the calculated data. The accuracy
of the proposed approach is validated. Good agreements are obtained between
simulation data and measured data. The proposed approach has the potential to
provide useful quantitative information of the unknown object particularly for
shape reconstruction, object detection and others.
Keywords: finite-difference
time-domain, forward-backward time-stepping, inverse scattering problems, overset
grid generation method
Author: Azarina Azman
Journal Code: jptkomputergg170079
