The importance of overload revealing in EMI receivers

Monti, Mario; Puri, Elena; Monti, Mario Rossi

doi:10.1109/emceurope.2017.8094645

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…Due to this, the new TD EMI receivers began to replace superheterodyne receivers. Advantages of using TD EMI receivers were discussed previously in [4], while disadvantages were shown in [5], [6]. When applying commercial TD EMI receivers, the speed of standard measurements can be significantly increased.…”

Section: Introductionmentioning

confidence: 99%

Efficient Multichannel Time-domain Multiaxis Loop Antenna Measurement for Frequencies below 30 MHz

Pokotilov

Vogt-Ardatjew

Leferink

2021

2021 IEEE International Joint EMC/SI/PI and EMC Europe Symposium

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Conventional frequency-domain measurements are slow and are not able to grab time-varying effects, compared to time-domain measurements. Standard measurement procedures, for example CISPR 36 for electric vehicles, requires measurements at multiple positions around the equipment under test. Small resolution bandwidth in combination with long dwell time for every frequency step, results in a long measurement time. This is especially true in the lower frequency range as the bandwidths are small and thus need more measurement time. CISPR 36 requires also using only one antenna in parallel or perpendicular position to the equipment under test at once. Using time-domain measurements, the measurement speed can be already significantly improved. The effectiveness of measurements can be increased drastically if multiple antennas are positioned at several locations around the equipment under test, and multiple digitiser channels are used in parallel. A new antenna construction for multidirectional measurements in combination with a cost-efficient multichannel digitizer for time-domain measurements in the frequency range below 30 MHz is proposed in this paper. Simulation results, theoretical background and initial measurements are shown, proving that such a method is indeed viable.

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Section: Introductionmentioning

confidence: 99%

Efficient Multichannel Time-domain Multiaxis Loop Antenna Measurement for Frequencies below 30 MHz

Pokotilov

Vogt-Ardatjew

Leferink

2021

2021 IEEE International Joint EMC/SI/PI and EMC Europe Symposium

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“…According to [6], since with TD measurement all frequency components are measured at the same time, the speed of measurement is significantly increased without a sacrifice in accuracy compared to FD methods [7], [8]. The advantages and disadvantages of TDEMI analysers have been discussed in [9] and [10]. For the NRE01 standard, where the measurement frequencies are between 30 Hz and 100 kHz, an expensive TDEMI analyser with a mixer stage is not needed.…”

Section: Introductionmentioning

confidence: 99%

Continuous Electromagnetic Emission Measurement Setup with Antenna Position Tracking

Pokotilov

Vogt-Ardatjew

Hartman

et al. 2020

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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ZAbstract -For measuring the maximum electromagnetic emissions around equipment many test methods use the frequency domain, traditionally using a super-heterodyne test receiver. However, for large equipment under test the frequency domain method is very time consuming when the measurements are performed at low frequencies, below 150 kHz, where small bandwidth and thus long measurement time is needed. Timedomain measurements are now replacing the traditional superheterodyne receivers, but the commercial time-domain receivers still use a first mixer stage. However, at low frequencies, low cost digitisers can do the same job directly in the baseband. Using fast signal processing, this method allows to continuously measure the radiated magnetic field around the equipment under test. Combined with position tracking, this allows to identify areas of maximum emissions very fast. These positions are then used to obtain a more detailed spectral analysis of emissions by increasing the measurement time over those spots. In result, the whole measurement procedure can be significantly optimized by spending less time over areas of lower interest, and putting more focus on areas of potentially high emission levels. This paper presents the concept as well as an experimental comparison of three antenna movement approaches satisfying the NRE01 and RE101 radiated emissions measurement procedures.

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“…above 30 MHz, and therefore make use of an intermediate frequency, a heterodyne receiver. Advantages, as in [5], [6], and challenges, as in [7], [8], of TDEMI analyzers have been discussed previously. As we are interested in the magnitude of the emissions in the low frequency range a low cost baseband digitizer can easily do the measurements, much better and much faster.…”

Section: Introductionmentioning

confidence: 99%

Fast Magnetic Emission Tests for Continuous Measurements Around an Equipment Under Test

Hartman

Moonen

Have

et al. 2019

2019 ESA Workshop on Aerospace EMC (Aerospace EMC)

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For the assessment of radiated electromagnetic interference (EMI) emission of an equipment under test (EUT) traditionally a limited amount of positions around the EUT are chosen. This is due to the long measurement time per position of the EMI test receiver, although the introduction of time domain electromagnetic interference (TDEMI) analyzers already created serious reduction in measurement time. The limited amount of measurement positions around an EUT means however that the maximum interference can be missed at certain positions around the EUT, creating an underestimation of the maximum emission. With the use of a low cost baseband digitizer this paper realizes a continuous positional measurement around an EUT. This measurement presents the maximum emission of the interference by considering every position around the EUT.

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The importance of overload revealing in EMI receivers

Cited by 5 publications

References 6 publications

Efficient Multichannel Time-domain Multiaxis Loop Antenna Measurement for Frequencies below 30 MHz

Efficient Multichannel Time-domain Multiaxis Loop Antenna Measurement for Frequencies below 30 MHz

Continuous Electromagnetic Emission Measurement Setup with Antenna Position Tracking

Fast Magnetic Emission Tests for Continuous Measurements Around an Equipment Under Test

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