On the Adequacy of the Far-Field Conditions for Pulsed Radiated EM Fields

Journal article (2015)

Authors

I.E. Lager Tera-Hertz Sensing - EEMCS
A.B. Smolders Eindhoven University of Technology
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2015 I.E. Lager, A.B. Smolders
DOI: https://doi.org/10.1109/LAWP.2015.2412371
Time-domain analysis Near fields Ultrawideband (UWB) antennas
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Published Date

2015

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

The far-field region’s bound is investigated in case of the pulsed electromagnetic field radiation. The value predicted by means of “standard,” time-harmonic considerations is compared with that following from the ratio between the maximum value of the time-domain, near- and far-field magnetic field strength
constituents. The adequacy of these criteria is analyzed in the case of a loop-to-loop transfer scenario. The obtained results are of relevance for close-range, wireless digital transfers and provide a safety margin for ensuring the adequacy of the “standard” far-field region’s limit in ultrawideband links.