WIT Press

Stability Analysis Of A Time-domain MM Code For Electromagnetic Scattering Predictions

Price

Free (open access)

Paper DOI

10.2495/ES960231

Volume

11

Pages

10

Published

1996

Size

915 kb

Author(s)

R. Guidi, G. Manara, A. Monorchio & R. Reggiannini

Abstract

It is known that numerical electromagnetic scattering simulators based on a time- domain version of the method of moments may exhibit instability phenomena induced by the joint space-time discretisation of the field equations. In this paper we address the above problem with specific reference to a simulation code which allows evaluating electromagnetic scattering from perfectly conducting bodies of arbitrary shape. The simulator relies on a triangular-patch geometrical model of the exterior surface of the scattering body and operates according to a marching- on-in-time technique, whereby the surface current distribution at a given time step is evaluated as a function of the previous distributions. A heuristic stability condition is devised for the

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