Quasi-Newton-Based inversion method for determining complex dielectric permittivity of 3-D inhomogeneous objects
Yükleniyor...
Dosyalar
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE-Institute Electrical Electronics Engineers Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We present a new method for determining the complex dielectric permittivity profile of 3-D inhomogeneous dielectric objects from measurements of the scattered electric field vectors in the frequency domain. The method is formulated as a minimization of a cost function defined in terms of electric field integral equations known as the object and data equations. Instead of an unknown object function containing the electromagnetic parameters of the dielectrics, the contrast sources induced within the scatterers are designated as the unknowns of the inversion scheme to avoid solving the forward scattering problem at each step. Later, the minimization of the cost function is achieved via a limited-memory quasi-Newton scheme, based on the Broyden-Fletcher-Goldfarb-Shanno (BFGS) formula, which iteratively updates the Hessian matrix estimation. The numerical results with the simulated and experimental scattered electric fields demonstrate that the presented method is capable of reconstructing scatterers with complex shapes.
Açıklama
This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant 216S415.
Anahtar Kelimeler
Dielectrics, Mathematical Models, Permittivity, Three-Dimensional Displays, Costs, Imaging
Kaynak
IEEE Transactions On Antennas and Propagation
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
70
Sayı
6
Künye
Coşğun, S., Bilgin, E., & Çayören, M. (2022). Quasi-Newton-Based Inversion Method for Determining Complex Dielectric Permittivity of 3-D Inhomogeneous Objects. IEEE Transactions on Antennas and Propagation, 70(6), 4810-4817.
