Emission Test Method for Source Stirred Reverberation Chambers With Scalar Measurements

Leo, Alfredo De; Russo, Paola; Primiani, Valter Mariani

doi:10.1109/access.2023.3245328

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…On the other hand, the stirred components are represented by the skirt, whose width is proportional to the Doppler spread. Given the latter is defined in this article according to (3), it has been found that 98% of the average power in the stirred components is roughly contained within 2 × νD around the middle of the Doppler spectrum, where νD is computed by (3). Additionally, the symmetric feature of the Doppler spectrum of the unloaded VIRC in Figs.…”

Section: ) Coherence Timementioning

confidence: 90%

“…On the other hand, a resonating and electrically large room creates a reverberation chamber (RC) that emulates a rich multipath environment. Such a chamber has been used in EMC to conduct, e.g., immunity measurements and radiated emission measurements [3]. In the last two decades, nevertheless, RCs have become an indispensable OTA-testing tool in research and development, namely, OTA testing of wireless baseband algorithms [4], [5], OTA-based antenna measurements [6]- [8], and OTA testing of wireless devices (i.e., baseband and antennas combined) [9]- [12].…”

Section: Introductionmentioning

confidence: 99%

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Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

Mahfouz,

Vogt-Ardatjew,

Kokkeler

et al. 2024

IEEE Access

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Over-the-air (OTA) testing and electromagnetic compatibility (EMC) measurements are widely performed in classical reverberation chambers. A less-known reverberation chamber, yet a considerably efficient environment for generating multipath conditions, is the vibrating intrinsic reverberation chamber (VIRC). This article thoroughly investigates the radio propagation channel inside the VIRC. The specific channels studied are narrowband single-input single-output (SISO) systems operating in the frequency range from 670-2740 MHz. A relevant application is OTA testing wireless baseband algorithms or modems for wireless sensor networks, specifically low-power wide-area networks such as Narrowband-IoT (NB-IoT), Long Range (LoRa) and Ultra-Narrowband (UNB). The focus is on the first-and second-order temporal and spectral channel characteristics: coherence time, Doppler spectrum, Doppler spread, frequency autocovariance function, coherence bandwidth, rejection rate of chi-squared goodness-of-fit test for Rician distribution, Rician K -factor, and channel gain. Besides the impact of the frequency of operation, the investigation considers the effect of the rotational speed of the VIRC motors, two loading conditions, on the channel characteristics. An analysis of the measurement results shows that the stirring efficiency degrades while the coherence time increases at slow rotational speeds, with loading, and/or at low frequencies. Moreover, empirical models closely fitting the behavior of various investigated characteristics are proposed, for which we provide foundational physical interpretations. A further investigation is carried out to demonstrate the generality and briefly illustrate the potential usability of these models for both EMC and OTA testing.INDEX TERMS Coherence bandwidth, coherence time, Doppler, electromagnetic compatibility (EMC), Kfactor, over-the-air (OTA), Rayleigh, rejection rate, Rician, vibrating intrinsic reverberation chamber (VIRC).

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Section: ) Coherence Timementioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

Mahfouz,

Vogt-Ardatjew,

Kokkeler

et al. 2024

IEEE Access

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“…Different methods to measure radiated emission exploit reverberation chambers [ 32 ]. As an example, in [ 33 ], the shielding effectiveness of different materials has been measured in a nested reverberation chamber up to 6 GHz.…”

Section: Introductionmentioning

confidence: 99%

Development of a Simple Setup to Measure Shielding Effectiveness at Microwave Frequencies

Cardillo,

Carcione,

Ferro

et al. 2024

Sensors

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Testing the shielding effectiveness of materials is a key step for many applications, from the industrial to the biomedical field. This task is very relevant for high-sensitivity sensors, whose performance can be greatly affected by electromagnetic fields. However, the available testing procedures often require expensive, bulky, and heavy measurement chambers. In this paper, a cost-effective and reliable measurement procedure for testing the shielding effectiveness of materials is proposed. It exploits a lab-scale anechoic shielded chamber, which is lightweight, compact, and cost-effective if compared to the available commercial solutions. The measurement procedure employs a vector network analyzer to allow an accurate and fast characterization setup. The chamber realization phases and the measurement procedure are described. The shielding capability of the chamber is measured up to 26 GHz, whereas the performance of commercial shielding coatings is tested to demonstrate the measurement’s effectiveness.

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Using of LPDA Antenna for UFA Evaluation in Radiated Immunity Test

Abdulhameed,

Kubík

2023

2023 International Conference on Applied Electronics (AE)

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Emission Test Method for Source Stirred Reverberation Chambers With Scalar Measurements

Cited by 3 publications

References 16 publications

Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

Development of a Simple Setup to Measure Shielding Effectiveness at Microwave Frequencies

Using of LPDA Antenna for UFA Evaluation in Radiated Immunity Test

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