Improved T-Matrix Method for Simultaneous Reconstruction of Dielectric and Perfectly Conducting Scatterers

Abstract

In this article, an improved T-matrix method is proposed to improve the accuracy for simultaneous reconstruction of dielectric scatterers and perfectly electric conductors (PEC). First, we modify the original T-matrix inversion method and obtain a preliminary reconstruction result. Then treat this result as a priori information, and a new initial iteration value is generated by truncating and assigning values to it. At the same time, genetic algorithm (GA) is used to optimize these truncation and assignment parameters. Finally, the optimization result is used as the initial value of the modified T-matrix method to obtain better reconstruction accuracy. The numerical simulation results under noisy conditions show that the proposed method can more clearly reconstruct the edges of the objects and have higher reconstruction accuracy.

Keywords

• Electromagnetic inverse scattering
• T-matrix
• genetic algorithm (GA)
• microwave imaging
• high accuracy