Substituting EMC emission measurement by field and cable scan method using measured transfer function
Today EMC emissions of automotive components are often measured in anechoic chambers by an antenna at fixed position according to CISPR 25 (ALSE-method). The antenna voltage often cannot sufficiently describe the behaviour of the measured electronic components and systems. Furthermore space requirem...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2013-07-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/11/183/2013/ars-11-183-2013.pdf |
| Summary: | Today EMC emissions of automotive components are often measured in anechoic
chambers by an antenna at fixed position according to CISPR 25
(ALSE-method). The antenna voltage often cannot sufficiently describe the
behaviour of the measured electronic components and systems. Furthermore
space requirements and costs are very high for the ALSE-method. Field- and
cable-scan methods combined with near-field to far-field transformation
techniques might be a good alternative.
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Residual reflections from the walls, the metallic floor, the measuring
table, interaction of the antenna with the environment, and other factors
affect the measurements. Thus, models which only regard the current
distribution for near- and far field calculation cannot produce results
equal to a chamber measurement.
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In this paper methods for computing transfer functions for the substitution
of EMC antenna measurements with field- and cable scans in a specified
calibration area are introduced. To consider influences of the environment,
the environment is characterized in a first step and included with transfer
functions in the calculation process for the equivalent ALSE-field. |
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| ISSN: | 1684-9965 1684-9973 |