Model-Corrected Microwave Imaging through Periodic Wall StructuresReport as inadecuate

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International Journal of Antennas and PropagationVolume 2012 2012, Article ID 948365, 7 pages

Research Article

Science Applications International Corporation, 4031 Colonel Glenn Highway, Beavercreek, OH 45431, USA

Department of Electrical and Computer Engineering, Ohio State University, 2015 Neil Avenue, Columbus, OH 43210, USA

Received 2 February 2012; Accepted 19 March 2012

Academic Editor: Danilo Erricolo

Copyright © 2012 Paul C. Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A model-based imaging framework is applied to correct the target distortion seen in microwave imaging through a periodic wall structure. In addition to propagation delays caused by the wall, it is shown that the structural periodicity induces high-order space harmonics leading to other ghost artifacts in the through-wall image. To overcome these distortions, the periodic layer Green’s function is incorporated into the forward model. A linear back-projection solution and a nonlinear minimization solution are applied to solve the inverse problem. The model-based back-projection image corrects the distortion and has higher resolution compared with free space due to the inclusion of multipath propagation through the periodic wall, but considerable sidelobe clutter is present. The nonlinear solution not only corrects target distortion without clutter but also reduces the solution to a sparse form.

Author: Paul C. Chang, Robert J. Burkholder, and John L. Volakis



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