Efficient analytical‐numerical modelling of ultra‐wideband pulsed plane wave scattering


Journal Article

Ultra‐wideband (UWB) pulsed plane wave scattering from a large but finite strip grating in free space is analysed in the frequency domain via decomposition into plane wave spectra, implemented numerically by the method of moments, and then inverted into the time domain (TD). To make this procedure practical under UWB conditions, closed form expressions are derived for interaction integrals involving widely separated expansion and testing functions. These closed forms are based on a judicious choice of the basis functions, and on asymptotic methods for reducing the integrals. Although large separation distances are assumed, the expressions have been found to be accurate for separations as small as 0·1 wavelengths. The TD self terms can also be evaluated efficiently. To test the frequency domain algorithm, comparisons are made with available data in the literature for surface currents and far‐field scattering from multiple strips. New short pulse TD results are shown as well. Copyright © 1993 John Wiley & Sons, Ltd

Full Text

Duke Authors

Cited Authors

  • Carin, L; Felsen, LB

Published Date

  • January 1, 1993

Published In

Volume / Issue

  • 6 / 1

Start / End Page

  • 3 - 17

Electronic International Standard Serial Number (EISSN)

  • 1099-1204

International Standard Serial Number (ISSN)

  • 0894-3370

Digital Object Identifier (DOI)

  • 10.1002/jnm.1660060103

Citation Source

  • Scopus