Hybrid Tdie-Tdpo Method for Studying on Transient Responses of Some Wire and Surface Structures Illuminated by an Electromagnetic Pulse

Luo, Wei; Wang, Yin; Zhu, Muhua; Zhao, Jimeng

doi:10.2528/pier11031104

Cited by 9 publications

(4 citation statements)

References 33 publications

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“…6. It is demonstrated that the transient currents obtained by the MOD-based TDIE-TDPO method decrease exponentially in the late-time, with no instability which may appear in some MOT-based hybrid schemes [31]. number increases in Fig.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Hybrid Tdie-Tdpo Method Using Weighted Laguerre Polynomials for Solving Transient Electromagnetic Problems

Zhu¹,

Zhou²,

Luo³

et al. 2012

PIER

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Abstract-An efficient and stable hybrid method, based on the time-domain integral equation (TDIE) and time-domain physical optics (TDPO), is developed for investigating transient radiation and scattering from perfectly electrical conducting (PEC) objects. It at first requires partitioning the PEC object surface into TDIE and TDPO regions, respectively. Then, a set of hybrid TDIE-TDPO equations is derived and solved using an adaptive marching-on-indegree (MOD) method. The fast Fourier transforms (FFT)-based blocking scheme is further implemented into the proposed algorithm so as to reduce N 2 O dependence of the traditional MOD method to N O log 2 (N O ), where N O is the highest order of the weighted Laguerre polynomials used for computation. Under such circumstances, its computational cost, in comparison with the full TDIE-MOD solver, is reduced significantly. Several numerical examples are presented to demonstrate its accuracy and efficiency in solving some typical transient electromagnetic problems.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Hybrid Tdie-Tdpo Method Using Weighted Laguerre Polynomials for Solving Transient Electromagnetic Problems

Zhu¹,

Zhou²,

Luo³

et al. 2012

PIER

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“…Besides methods in frequency domain, analysis of wide-band reflected signals directly in time domain [37][38][39][40][41][42] began to emerge since time-domain physical optics (TDPO) was proposed by Sun [25] in 1994. Most of PO and GO-based high frequency methods in both frequency and time domain have been implemented and used widely, except timedomain version of iterative physical optics which considers multiple scattering directly in time domain.…”

Section: Time-domain High Frequency Theory For Combinative Targetmentioning

confidence: 99%

Time-Domain Iterative Physical Optics Method for Analysis of Em Scattering From the Target Half Buried in Rough Surface: Pec Case

Li¹,

Wei²,

He³

et al. 2011

PIER

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Abstract-In this paper, time-domain physical optics (TDPO) method is extended to its iterative version (TDIPO) to consider the coupling effects between two regions, and the latter is employed to investigate electromagnetic scattering from three dimensional target half-buried by a two dimensional rough surface. By using iterative scheme, more accurate transient response reflected from combinative target with multi-scattering effects would be obtained than that by using TDPO alone. The TDIPO could also be enhanced by time-domain equivalent edge current (TDEEC) to further determine the far-field characteristics of the combinative target with rough surface. An accurate composite geometry model technique which combines 2D perfectly electrically conducting (PEC) rough surface and half-buried 3D PEC target is introduced and employed to assist the meshing work. The validity of the presented method is verified by comparing the scattering results for dihedral targets with those obtained through TDPO and finite difference in time domain (FDTD), as well as multi-level fast multiple algorithm (MLFMA). Then simulations of EM scattering from the target embedded in rough surface for different incidence directions are carried out to test the availability of TDIPO/EEC. Discussions on the effects of incidence direction and the presence of the target on the backscattering in farzone are also given.

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“…Time-domain integral-equation (TDIE) [1][2][3][4][5][6] methods have enjoyed widespread engineering applications, especially the analysis of broadband electromagnetic scattering. When analyzing the scattering from perfect electric conductor (PEC), the TDIE methods require a discretization of the scatterer surface and do not call for absorbing boundary conditions in the finite difference time domain [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Transient Electromagnetic Scattering Using Time Domain Fast Dipole Method

Ding¹,

Gu²,

Li³

et al. 2013

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Hybrid Tdie-Tdpo Method for Studying on Transient Responses of Some Wire and Surface Structures Illuminated by an Electromagnetic Pulse

Cited by 9 publications

References 33 publications

Hybrid Tdie-Tdpo Method Using Weighted Laguerre Polynomials for Solving Transient Electromagnetic Problems

Hybrid Tdie-Tdpo Method Using Weighted Laguerre Polynomials for Solving Transient Electromagnetic Problems

Time-Domain Iterative Physical Optics Method for Analysis of Em Scattering From the Target Half Buried in Rough Surface: Pec Case

Analysis of Transient Electromagnetic Scattering Using Time Domain Fast Dipole Method

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