NDLI: Passive field uniformity enhancement in reverberation chambers

Content Provider	IEEE Xplore Digital Library
Author	Roman, M. van Zyl, R.
Copyright Year	2011
Description	Author affiliation: Department Electrical Engineering, Cape Peninsula University of Technology, Cape Town, South Africa (Roman, M.; van Zyl, R.)
Abstract	Much has been written on field uniformity enhancement and different types of stirrers for reverberation chambers. We have distilled the theory and applied this to a full-wave electromagnetic simulation of an empty, rectangular cavity with and without the introduction of shaped conductive structures. In anticipation of real-life applications, both dipole and Yagi-Uda antennas, orientated in the vertical and horizontal, were used as radiators. This study presents attempts to passively distribute the fields more evenly inside a reverberation chamber by supporting more modes with the introduction of conductive structures inside the chamber. A brief theoretical background is given to support the simulation-based analysis reported here. Simulations were conducted for a 1.86 × 2.44 × 2.47 m screened room. The results show that passive field enhancement has improved the standard deviation when compared to an empty chamber. The simulated standard deviation of the internal total electric field distribution over a frequency band of 1 – 2 GHz shows marginal improvement in the field uniformity of between 0.6 dB at lower frequencies and 0.1 dB at higher frequencies when introducing static conductive structures in the cavity and employing a horizontally positioned dipole. However, passive “stirring” of the modes alone does not satisfy the requirements for electromagnetic compatibility testing using reverberation chambers, but it does pose an improvement in the performance of reverberation chambers where dynamic mixing of the modes is done through rotating stirrer structures.
Starting Page	1
Ending Page	6
File Size	1269397
Page Count	6
File Format	PDF
ISBN	9781612849928
ISSN	21530033
e-ISBN	9781612849935
DOI	10.1109/AFRCON.2011.6072103
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-13
Publisher Place	Zambia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cavity resonators Dipole antennas Yagi-Uda antennas Reverberation chamber Electric fields reverberation chamber electromagnetic compatibility electromagnetic inteference field uniformity mode stirrers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Simulation of field uniformity in a reverberation chamber

Simulation of stirred fields within a reverberation chamber using a refined spectral-domain-factorization moment method

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