Electromagnetic Shielding Performance of Highly Resonant Enclosures by a Combination of the FETD and Extended Prony's Method

It is known that in applying the time-domain methods to study electromagnetic response of the system, the long time record required for generating accurate frequency domain results can be extrapolated from a relatively short time record by using Prony's method. In this paper, the electromagneti...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2014-04, Vol.56 (2), p.320-327
Main Authors: NIE, Bao-Lin, DU, Ping-An
Format: Article
Language:English
Subjects:
Apertures
Applied classical electromagnetism
Applied sciences
Arrays
Coaxial cables
Computational modeling
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electromagnetic compatibility
Electromagnetic shielding
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Electronics
Enclosures
Exact sciences and technology
Extrapolation
Finite element analysis
finite-element methods
Fundamental areas of phenomenology (including applications)
Information, signal and communications theory
Mathematical analysis
Miscellaneous
Physics
power transmission
Prony's method
Sampling
sampling methods
shielding
Studies
Telecommunications and information theory
Testing, measurement, noise and reliability
Time-domain analysis
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Summary:It is known that in applying the time-domain methods to study electromagnetic response of the system, the long time record required for generating accurate frequency domain results can be extrapolated from a relatively short time record by using Prony's method. In this paper, the electromagnetic shielding performances of two highly resonant enclosures with slot or aperture array are investigated by a combination of the finite-element time-domain (FETD) and extended Prony's method with a much smaller number of iterations. The procedure and details of using this combined method to investigate the shielding properties of highly resonant enclosures is demonstrated extensively. Moreover, some rules about selecting the parameters such as sampling position, sampling interval, sampling duration, and number of poles are proposed. As shown by comparison with the direct FETD generated results, the combined method achieves the same type of accuracy of frequency-domain delivered power with a FETD time record computed over a much shorter time duration.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2013.2279404