Broadband EMC immunity testing and procedures
Laurila, Juho (2025)
2025
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2025053018369
https://urn.fi/URN:NBN:fi:amk-2025053018369
Tiivistelmä
The topic for this thesis was commissioned by Verkotan Oy. Verkotan offers testing services in many fields including OTA, SAR and EMC. The main objective was to explore EMC immunity testing with broadband signals, especially OFDM modulated signals. A secondary focus to explore multi-tone immunity testing with OFDM modulated signals.
The work included the creation of software for running feasibility measurements, software for generating broadband waveforms and an overview of the IEC/EN 61000-4-41 standard and how it could be applied for use with OFDM signals.
The main objective was completed as measurements were accomplished to determine the feasibility of running broadband immunity tests with the available equipment. Multi-tone applications were explored, but not tested due to time, equipment and complexity limitations. The measurements showed that it was possible to generate above 10V/m fields at most frequencies between 1GHz to 3.2GHz. However, achieving the same field strengths at higher frequencies would likely be problematic without big changes to the testing setup.
The work included the creation of software for running feasibility measurements, software for generating broadband waveforms and an overview of the IEC/EN 61000-4-41 standard and how it could be applied for use with OFDM signals.
The main objective was completed as measurements were accomplished to determine the feasibility of running broadband immunity tests with the available equipment. Multi-tone applications were explored, but not tested due to time, equipment and complexity limitations. The measurements showed that it was possible to generate above 10V/m fields at most frequencies between 1GHz to 3.2GHz. However, achieving the same field strengths at higher frequencies would likely be problematic without big changes to the testing setup.