Time-Domain Electromagnetic Leaky Waves

Journal article (2023)

Authors

M. Stumpf Brno University of Technology

Junhong Gu Student

I.E. Lager Electrical Engineering Education -

Research Group

Electrical Engineering Education () (TU Delft)

DOI: https://doi.org/10.1109/TAP.2023.3249358

Time-domain (TD) analysis Leaky wave (LW) Head waves (HW) Body wave (BW) Cherenkov radiation Cagniard-deHoop (CdH) technique

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Published Date

2023

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electrical Engineering Education

Abstract

A causality preserving interpretation of the electromagnetic (EM) leaky-wave (LW) propagation in space and time is proposed for the first time. The Cagniard-deHoop (CdH) joint transform technique is applied for elucidating the relation between time-domain (TD) head waves (HWs), body waves (BWs), Cherenkov wave effects, and LWs. It is conjectured that the LW phenomenon in the TD is associated with a local maximum in the observed signal that occurs between the arrivals of the HW and BW constituents. A quantitative analysis that enables the space-time localization of the LW effect is performed theoretically and, then, illustrated via representative examples including the pulsed EM radiation from both a line source above a dielectric half-space, and narrow-slot antennas.

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- Embargo expired in 04-09-2023