PRELIMINARY RESULTS ON ESTIMATION OF THE DISPERSIVE DIELECTRIC PROPERTIES OF AN OBJECT UTILIZING FREQUENCY-DEPENDENT FORWARD-BACKWARD TIME-STEPPING TECHNIQUE | Zendy

Shi Wei Ng | Zendy; Kismet Anak Hong Ping | Zendy; Shafrida Sahrani | Zendy; Mohamad Hamiruce Marhaban | Zendy; Mohd Iqbal Sariphan | Zendy; Toshifumi Moriyama | Zendy; Takashi Takenaka | Zendy

Open Access

PRELIMINARY RESULTS ON ESTIMATION OF THE DISPERSIVE DIELECTRIC PROPERTIES OF AN OBJECT UTILIZING FREQUENCY-DEPENDENT FORWARD-BACKWARD TIME-STEPPING TECHNIQUE

Author(s) -

Shi Wei Ng,

Kismet Anak Hong Ping,

Shafrida Sahrani,

Mohamad Hamiruce Marhaban,

Mohd Iqbal Sariphan,

Toshifumi Moriyama,

Takashi Takenaka

Publication year - 2016

Publication title -

progress in electromagnetics research m

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.216

H-Index - 31

ISSN - 1937-8726

DOI - 10.2528/pierm16051907

Subject(s) - dielectric , object (grammar) , estimation , computer science , optics , acoustics , mathematics , materials science , physics , artificial intelligence , optoelectronics , engineering , systems engineering

In this paper, a Frequency-Dependent Forward-Backward Time-Stepping (FD-FBTS) inverse scattering technique is used for reconstruction of homogeneous dispersive object. The aim of the technique is to reconstruct the relative permittivity at infinite frequency, static relative permittivity and static conductivity of the homogeneous dispersive object simultaneously. The technique utilizes iterative finite-difference time-domain (FDTD) method for solving inverse scattering problem in time domain. The minimization of the cost functional is carried out utilizing Dai-Yuan nonlinear conjugate-gradient algorithm. The Frechet derivatives of the augmented cost functional are derived analytically with respect to scatterer properties. Numerical results for reconstruction of two-dimensional homogeneous dispersive illustrate the performance of the proposed technique.

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