Description:
This final-year project falls within the field of electromagnetic compatibility (EMC) and focuses on the study of the use of a mode-mixing chamber for carrying out radiated emission measurements. Conventional methods for measuring radiated emissions generally rely on tests in anechoic chambers or at open-field measurement sites, which are costly and restrictive facilities. In this context, the mode-mixing chamber appears to be a potential alternative for certain applications, particularly in pre-qualification, comparative characterisation or the development of electronic products.
The work will begin with an in-depth literature review aimed at analysing the state of the art regarding mode-mixing chambers and their use for radiated emission measurements. This review will focus in particular on the measurement methods proposed in the literature, statistical processing techniques for electromagnetic fields, and calibration approaches enabling measurements in mode-mixing chambers to be linked to standardised measurement methods.
Based on this literature review, a theoretical analysis will be conducted to gain a better understanding of the operating principles of mode-mixing chambers, the statistical distribution of electromagnetic fields within the cavity, and the parameters influencing the accuracy, repeatability and uncertainty of radiated emission measurements.
In the second part, an experimental measurement protocol will be developed. This will be based on the use of a reference source and the actual equipment to be characterised. Measurements will be carried out using a real-time spectrum analyser to assess the feasibility of establishing a calibration curve to correlate the results obtained in the mode-mixing chamber with those from a standardised radiated emissions measurement device. A critical analysis of the results, including an assessment of measurement uncertainties and reproducibility, will also be carried out.
This work will enable the student to acquire skills in electromagnetic compatibility, electromagnetic field measurements, radio frequencies, measurement instrumentation, as well as the analysis and processing of experimental data. The ACE department’s laboratory has all the necessary equipment to carry out this work, enabling a study combining theoretical and experimental aspects.
Labo Entreprise: eFFiciency research SRL
Nom du contact industriel: Fabrice Frébel
email du contact industriel: fabrice dot frebel at efficiencyresearch dot be
Adresse Web: https://www.efficiencyresearch.be/
Contact FSA: Véronique Beauvois - V dot Beauvois at uliege dot be