The commutability of spectrum-based measurement technique in electromagnetic emission measurements achieved by fast fourier transform and the superheterodyne principles.

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Szűcs László
Department of Broadband Infocommunications and Electromagnetic Theory

Nowadays, due to the effect of development in technology more and more electronic devices surround us which perform increasingly important tasks, among others, also that in case of failure can cause serious problems. The automotive industry is such an area, where not only the device is at stake but even people’s lives. Therefore an important consideration is, that the electronic devices do not disturb each others normal operation by emitted electromagnetic interferences.

Electromagnetic Compatibility (EMC), is an emerging discipline that deals with these problems. It seeks to create secure and „peaceful” adjacent operation of electrical devices, equipments and facilities with unique approach and strategy, international standards and using the latest technical achievements. The formation of this science was mainly motivated by the technological progress.

The electromagnetic compatibility tests deal with the susceptibility and emission of electrical devices. These tests are achieved by proven measurements in the frequency domain, whereby the disturbance is examined at each frequency in the swept range. It is expected, that this method has a disadvantage: the greater the examined range the longer the measurement time.

My task is to perform comparative measurements on electronic control units and DC motors, examining the interchangeability of the traditional frequency domain measurement and Fast Fourier Transformation.


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