A STABLE MARCHING-ON-IN-TIME SCHEME FOR WIRE SCATTERERS USING A NEWMARK-BETA FORMULATION | Zendy

Sena E. Bayer | Zendy; A. Arif Ergin | Zendy

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A STABLE MARCHING-ON-IN-TIME SCHEME FOR WIRE SCATTERERS USING A NEWMARK-BETA FORMULATION

Author(s) -

Sena E. Bayer,

A. Arif Ergin

Publication year - 2008

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.208

H-Index - 47

ISSN - 1937-6472

DOI - 10.2528/pierb08031215

Subject(s) - beta (programming language) , scheme (mathematics) , computer science , mathematics , mathematical optimization , mathematical analysis , programming language

The aim of this workis to increase the instability of the marching-on-in-time (MOT) method that is used in the analysis of wide-band electromagnetic pulse scattering from structures made of thin wires. The stability problem has been identified with the advent of the MOT method in 1991, and although several improvements have been suggested to overcome this difficulty no exact solution has been found (1). In this thesis two methods (the Newmark-Beta formulation and the analytic integration) to suppress the instabilities of the MOT algorithm for thin wire scatterers have been proposed and their effects on the stability have been inspected. The results are compared with the results obtained with time domain method of moments (MOM) (2) and it is observed that the results are both stable and accurate. It is shown how the stability is changed by a determined β parameter. Also, Newmark-Beta formulation results for selected different types of structures such as dipole antenna illuminated by a Gaussian pulse given in (3), three pole structure given in (4), loop antenna given in (3) has been shown.

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