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Efficient Plane Wave Excitation for 3-D Laguerre-Based FDTD Method

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Abstract:

In the three-dimensional (3-D) Laguerre-based finite-difference time-domain method, each electric field variable has the relationship with the adjacent twelve electric fields. This results in the tedious modification of field components adjacent to the total-field/scatter-field boundary in analyzing scattering problems. In addition, the plane wave excitation requires much time in evaluating the expansion coefficient of incident field which involves integral of the weighted Laguerre polynomials with respect to time. In this letter, the plane wave is introduced by defining a set of equivalent currents on a closed Huygen's surface and a computationally efficient one-dimensional auxiliary propagator is presented to speed up the plane wave excitation. Numerical results indicated that the proposed method is valid.

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Periodical:

Applied Mechanics and Materials (Volumes 556-562)

Pages:

4542-4546

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.556-562.4542

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Online since:

May 2014

Authors:

Zheng Chen*, Yan Tao Duan, Ye Rong Zhang, Cheng Gao

Keywords:

Finite Difference Time Domain (FDTD) Method, Laguerre Polynomials, Plane Waves

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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