A Nonlinear Inversion Approach Enhanced by a Recursive Formulation for Efficient Imaging in Arbitrarily Shaped Multilayer Cylinders
International Marmara Science and Social Sciences Congress (IMASCON-2026), Kocaeli, Türkiye, 8 - 09 Mayıs 2026, ss.52, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Kocaeli
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.52
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
We present an efficient electromagnetic imaging approach for reconstructing dielectric objects embedded
in multilayer cylindrical structures with arbitrarily shaped interfaces. Such configurations arise in a wide
range of applications. In these problems, the presence of layered structures significantly influences wave
propagation and must be accurately accounted for in the imaging process.The proposed method is
formulated within the Contrast Source Inversion (CSI) framework using the Green’s function of the
multilayer background. In this formulation, accurate evaluation of the background fields and the associated
Green’s function plays a critical role in the overall reconstruction performance. Efficient computation of the
multilayer Green’s function, the corresponding background fields, and the cell integrals required in the CSI
iterations is achieved through a recursive eigenfunction-expansion formulation for noncircular geometries
(EE-NCS). This approach enables fast and accurate evaluation of these quantities while significantly
reducing the overall computational cost. Numerical results demonstrate that the proposed method provides
accurate reconstructions of embedded objects in multilayer environments while maintaining high
computational efficiency. The combination of CSI and the recursive EE-NCS formulation provides a
practical and scalable solution for electromagnetic imaging in multilayer cylindrical structures with
arbitrarily shaped interfaces.