TY - JOUR
T1 - A Direct Imaging Method for Inverse Electromagnetic Scattering Problem in Rectangular Waveguide
AU - Junqing Chen & Guanghui Huang
JO - Communications in Computational Physics
VL - 5
SP - 1415
EP - 1433
PY - 2018
DA - 2018/04
SN - 23
DO - http://doi.org/10.4208/cicp.OA-2017-0048
UR - https://global-sci.org/intro/article_detail/cicp/11221.html
KW - Electromagnetic waveguide, inverse scattering problem, reverse time migration, extended obstacle.
AB - <p style="text-align: justify;">We propose a direct imaging method based on reverse time migration (RTM)
algorithm for imaging extended targets using electromagnetic waves at a fixed frequency
in the rectangular waveguide. The imaging functional is defined as the imaginary
part of the cross-correlation of the Green function for Helmholtz equation and the
back-propagated electromagnetic field. The resolution of our RTM method for penetrable
extended targets is studied by virtue of Helmholtz-Kirchhoff identity in the rectangular
domain, which implies that the imaging functional always peaks in the target.
Numerical examples are provided to demonstrate the powerful imaging quality and
confirm our theoretical results.</p>