Time-domain near-field/near-field transform with PWS operations

¹ IRSEEM, EA 4353, At Graduate School of Engineering ESIGELEC, Technopole du Madrillet, Avenue Galilée, BP 10024, 76801 Saint-Étienne-du-Rouvray Cedex, France
² National Engineering School of Sousse (ENISo), Technopole de Sousse, 4054 Sousse, Tunisia

Corresponding author: blaise.ravelo@yahoo.fr

Received: 5 November 2010
Revised: 7 December 2010
Accepted: 5 January 2010
Published online: 22 February 2011

Abstract

This article deals with the development of computation method dedicated to the extraction of the transient EM-near-field at certain distance from the given 2D data for the baseband application up to GHz. As described in the methodological analysis, it is based on the use of fft combined with the plane wave spectrum (PWS) operation. In order to verify the efficiency of the introduced method, a radiating source formed by the combination of electric dipoles excited by a short duration transient pulse current with a spectrum bandwidth of about 5 GHz is considered. It was shown that compared to the direct calculation, one gets the same behaviors of magnetic near-field components H_x, H_y and H_z with the presented extraction method, in the planes placed at {3 mm, 8 mm, 13 mm} of the initial reference plane. To confirm the relevance of the proposed transform, validation with a standard commercial tool was performed. In future, we envisage to exploit the proposed computation method to predict the transient electromagnetic (EM) field emissions notably in the microwave electronic devices for the EMC applications.