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On the spatial bandwidth of scattered fields

1987; Institute of Electrical and Electronics Engineers; Volume: 35; Issue: 12 Linguagem: Inglês

10.1109/tap.1987.1144024

1558-3643

O.M. Bucci, Giorgio Franceschetti,

Geophysical Methods and Applications

It is shown that the scattered fields are almost space bandlimited functions. The effective bandwidth W is introduced and evaluated for a very general scattering system, as well as the error made using functions bandlimited to w > W for representing the scattered field. The effective bandwidth is very simply related to the maximum dimension of the scattering system; the error drops to negligible values for modest increases of w compared to W , in the case of large scatterers. Important consequences of the above general results are finally stressed.