Work

Transient Electromagnetic Kirchhoff Diffraction by a Temporally Discontinuous Spatially Truncated Conductive Sheet

Year: 2025

Type: article

Abstract: The time-domain (TD) electromagnetic (EM) plane-wave (PW) response of a time-varying (TV), conductive finite sheet is described with the aid of Kirchhoff’s approximation and the Cagniard-deHoop (CdH) technique. Closed-form analytical expressions are derived for the unit-step excitation and the jump temporal discontinuity of electric conductivity. It is explicitly demonstrated that, under Kirchhoff’s approximation, the abrupt change in the sheet’s electrical conductivity gives rise to a transverse EM (TEM) PW constituent propagating away from the sheet in the normal direction with respect to its plane. Moreover, the effect of step modulation manifests itself via diffracted cylindrical waves emanating from the sheet’s edges. Illustrative numerical examples are presented.

Source: IEEE Transactions on Antennas and Propagation

DOI: 10.1109/tap.2025.3620543

Authors: Martin Štumpf, Amir Shlivinski, Yakir Hadad

Institutions: Brno University of Technology, Ben-Gurion University of the Negev, Tel Aviv University

Language: English

Topic: Electromagnetic Scattering and Analysis

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Israel Science Foundation

Awards: G5322726861, G6513252985