Spherical near field facility for characterizing random emissions

In a previous paper, a new time domain near field (TDNF) method for characterizing random emissions has been presented . This method, which extends classical antenna NF techniques to random emissions, is based on the measurement of the spatial coherence of the NF distribution over a sphere in a narr...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2005-08, Vol.53 (8), p.2582-2589
Main Authors: Fourestie, B., Bolomey, J.-C., Sarrebourse, T., Altman, Z., Wiart, J.
Format: Article
Language:English
Subjects:
Antenna measurements
Antennas
Applied sciences
Chambers
Coherence
Coherence Matrix
correlation
Devices
Electromagnetic compatibility
electromagnetic compatibility (EMC)
Exact sciences and technology
Frequency bands
Frequency measurement
GSM
Information, signal and communications theory
Measurement techniques
near field
Near fields
Noise measurement
Power measurement
random fields
signal subspace decomposition
Spatial coherence
Spatial distribution
Telecommunications and information theory
Telephone sets
Telephony
Testing
Time domain
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Summary:In a previous paper, a new time domain near field (TDNF) method for characterizing random emissions has been presented . This method, which extends classical antenna NF techniques to random emissions, is based on the measurement of the spatial coherence of the NF distribution over a sphere in a narrow frequency band. The present paper describes a spherical facility which has been specially designed for experimentally implementing this NF method. This new TDNF measurement technique has been experimentally validated on radiating devices such as GSM telephone handsets. It allows one to derive not only the total power radiated by a device under test, as it could be done in a reverberating chamber, but also to obtain the spatial distribution of the radiated field outside the measurement sphere and, more particularly the far-field (FF) radiation pattern.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2005.851847