Fast Frequency Sweep Using Asymptotic Waveform Evaluation Technique and Thin Dielectric Sheet Approximation

Jeong, Yi-Ru; Hong, Ic‐Pyo; Lee, Kyung-Won; Lee, Jong‐Hyun; Yook, Jong‐Gwan

doi:10.1109/tap.2016.2529681

Cited by 22 publications

(4 citation statements)

References 19 publications

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“…During the past decades, Asymptotic Waveform Evaluation (AWE) has always been a prevalent frequency domain technique for solving electromagnetic scattering problems over a wide frequency band. Under the framework of moment of method (MOM), AWE was applied to fast calculate the wideband radar cross section (RCS) of conducting and dielectric objects [1][2][3][4]. The fast multipole method (FMM) and multilevel fast multipole method (MLFMM) in conjunction with AWE has been successfully used for handling the electromagnetic scattering problems of electrically large objects [5,6].…”

Section: Introductionmentioning

confidence: 99%

Application of Compressive Sensing to Asymptotic Waveform Evaluation for Fast Frequency-Sweep Analysis of Electromagnetic Scattering Problems

Kong

Chen

Cao

et al. 2019

International Journal of Antennas and Propagation

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To reduce the computing resource of full-scale impedance matrix and its high-order derivatives in traditional Asymptotic Waveform Evaluation (AWE), compressive sensing (CS) is applied to AWE for fast and accurate frequency-sweep analysis of electromagnetic scattering problems. In CS framework, some prior knowledge is extracted by constructing and solving undetermined equation of 0-order surface induced current, so that coefficients about high-order induced current can be accurately obtained by the prior knowledge, and finally the wide-band radar cross section (RCS) is calculated. Numerical results of two-dimensional objects and bodies of revolution (BOR) were presented to the show the efficiency of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Application of Compressive Sensing to Asymptotic Waveform Evaluation for Fast Frequency-Sweep Analysis of Electromagnetic Scattering Problems

Kong

Chen

Cao

et al. 2019

International Journal of Antennas and Propagation

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“…Thus, the combined integral equation with the EFIE and the TDS requires fewer unknowns than a coupled surface-volume EFIE or surface integral equations such as Poggio-Miller-Chan-Harrington-Wu-Tsai (PMCHWT) [3]. Therefore, various researches using the EFIE-TDS have been reported [4,5].…”

Section: Introductionmentioning

confidence: 99%

Application of a CMP to an EFIE–TDS surface integral equation

Jeong

Hong

Yook

2018

IET Microwaves, Antennas & Propagation

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Convergence rates of coupled electric field integral equation (EFIE) and thin dielectric sheet (TDS) surface integral equation is improved using a Calderon multiplicative preconditioner (CMP) for efficient analysis of densely discretised structures comprising perfect electric conductors and thin dielectric layers. When relative permittivity of the thin dielectric layer is not high, the integral operator for the TDS tends to have fast convergence rate than that of the EFIE because the TDS is derived from a volume EFIE that is well‐posed. However, the integral operator for the EFIE is both unbounded and ill‐posed when it is applied to densely discretised surfaces. Thus, the coupled EFIE and TDS integral equation have a slow convergence rate in an iterative solver. The proposed method shows fast convergence rate by application of the CMP to the EFIE–TDS. As a result, an iteration number in the iterative solver is reduced in the proposed method.

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“…Recently, this study is generalised to solve multilayer TDS surfaces [11]. In [12], the wideband frequency domain solution of the TDS surface modelling is done with the combination of another method. Therefore, it seems that the wide spectrum of dielectric constants and the thicker layer in the thin surface modelling is still of interest among the electromagnetic community.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a thin, penetrable, and non‐uniformly loaded cylindrical reflector illuminated by a complex line source

Oğuzer

Kuyucuoğlu

Avgin

et al. 2017

IET Microwaves, Antennas & Propagation

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A thin, penetrable, and cylindrical reflector is illuminated by the incident field of a complex source point. The scattered field inside the reflector is not considered and its effect is modelled through a thin layer generalised boundary condition (GBC). The authors formulate the structure as an electromagnetic boundary value problem and two resultant coupled singular integral equation system of equations are solved by using regularisation techniques. The GBC provides us to simulate the thin layer better than the resistive model which is applicable only for very thin sheets. Hence, the more reliable data can be obtained for high-contrast and low-loss dielectric material. The scattering and absorption characteristics of the front-fed and offset reflectors are obtained depending on system parameters. Also, the effects of the edge loading are examined for both E-and Hpolarisations. The convergence and the accuracy of the formulation are verified in reasonable computational running time.

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Fast Frequency Sweep Using Asymptotic Waveform Evaluation Technique and Thin Dielectric Sheet Approximation

Cited by 22 publications

References 19 publications

Application of Compressive Sensing to Asymptotic Waveform Evaluation for Fast Frequency-Sweep Analysis of Electromagnetic Scattering Problems

Application of Compressive Sensing to Asymptotic Waveform Evaluation for Fast Frequency-Sweep Analysis of Electromagnetic Scattering Problems

Application of a CMP to an EFIE–TDS surface integral equation

Analysis of a thin, penetrable, and non‐uniformly loaded cylindrical reflector illuminated by a complex line source

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