| Volumes Volume 6 Contents of Current Session |
www.adv-radio-sci.net/6/311/2008/
doi:10.5194/ars-6-311-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
Measurement of electromagnetic interference in time-domain
Lehrstuhl für Hochfrequenztechnik, Arcisstraße 21, 80333 München, Germany
Abstract. Time-domain EMI measurement systems allow measurement time to be reduced by several orders of magnitude. In this paper a novel real-time operating time-domain EMI measurement system is presented. By the use of several analog-to-digital converters the dynamic range requested by the international EMC standards is achieved. A real-time operating digital signal processing unit is presented. The frequency band that is investigated is subdivided into several sub-bands. A novel implementation of the 9 kHz IF filter for the frequency 150 kHz to 1 GHz is presented. By this way the measurement time has been reduced by a factor of 8000 in comparison to conventional EMI receivers. During emission measurements performed with a modelled IF-bandwidth of 9 kHz the noise floor is decreased to −19 dBµV in the average detector mode by the implemented low noise power splitter. Measurements have been performed with the improved measurement system in the frequency range 30 MHz–1 GHz.
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Citation: Braun, S., Frech, A., and Russer, P.: Measurement of electromagnetic interference in time-domain, Adv. Radio Sci., 6, 311-313, doi:10.5194/ars-6-311-2008, 2008. Bibtex EndNote Reference Manager XML
