Power Loss in Reverberation Chambers by Antennas and Receivers

Cozza, Andréa

doi:10.1109/temc.2017.2777405

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…being identical for both measurements, it vanishes in (2). A definition of the antenna Q-factor Q −1 a,Lx has been first proposed by Hill [12] before being refined in [11] by taking into account the power reflected back by the antenna towards the chamber:…”

Section: Measurement Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Contactless Antenna Radiation Efficiency Measurement Within Reverberation Chambers: Sensitivity Improvement

Sarrazin

Labdouni

Krouka

et al. 2022

2022 52nd European Microwave Conference (EuMC)

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This paper discusses the sensitivity improvement of a contactless antenna radiation efficiency measurement method within reverberation chambers (RCs). The method does not need to connect the antenna under test to an analyzer through cables, which are known to disturb antenna impedance and radiation characteristics when placed in the reactive field zone of electrically small antennas. The sensitivity improvement is achieved through the use of multiple identical AUTs located within the RC in order to enhance the quality factor variation introduced by the modification of the AUT load impedance.

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Section: Measurement Methodsmentioning

confidence: 99%

“…The method is based on RC Q-factor measurement for two different AUT load conditions. Then, using a recent model of antenna Q-factor introduced in [11], the AUT radiation efficiency can be retrieved.…”

Section: Introductionmentioning

confidence: 99%

Contactless Antenna Radiation Efficiency Measurement Within Reverberation Chambers: Sensitivity Improvement

Sarrazin

Labdouni

Krouka

et al. 2022

2022 52nd European Microwave Conference (EuMC)

View full text Add to dashboard Cite

show abstract

“…Eqs. ( 6) and ( 7) represents the complex scattering reflection coefficient for Tx and Rx, respectively [21,22]. Yet, according to IEC 61000-4-21 and the scatteringparameter model of a chamber, Eq.…”

Section: Theoretical Model For Qmentioning

confidence: 99%

Evaluation of equivalent conductivity of reverberation chambers wall

Zhao,

Zhou,

et al. 2024

IEICE Electron. Express

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For the simulation or theoretical analysis of reverberation chambers, the conductivity of the chamber wall is commonly used when modeling a reverberation chamber, which is one of the focal points of concern for the electromagnetic compatibility community. If the conductivity is not properly set, the field level formed within a chamber will be different from what is expected. The conductivity can be used to estimate the quality factor. Therefore, we get the appropriate equivalent conductivity by comparing numerical results and experimental results of quality factor. To reduce the dependence on the frequency and the dimensions of a chamber, we proposed an intermediate parameter α-based setting for the conductivity, i.e., 10 kS/m for α < 40, 40 kS/m for 40 < α < 80, and α > 80 for 100 kS/m. The numerical results of the quality factor have been verified by the measurement performed within two reverberation chambers. It is expected that the proposed conductivity setting in terms of α will be a useful way for the simulation or theoretical analysis of reverberation chambers.

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Understanding the Apparently Poor Conductivity of Galvanized Steel Plates

Cozza¹

2021

IEEE Access

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This paper investigates the physical reasons for the apparently poor conductivity of galvanized steel plates (GSP), which has not yet received a proper explanation. Apparent conductivities as low as 0.1 MS/m were reported in the past, which are incongruously low compared to the DC conductivity of steels (4 to 8 MS/m), or zinc (16.7 MS/m), the most common coating agent used against corrosion in steel products. A comprehensive review of results from metallurgy and materials science is presented, providing insights about the multi-layered structure of zinc-based coatings. These are found to be made of a limited set of intermetallic zinc-iron compounds each characterized by a steeply decreasing conductivity as their iron percentage increases. Depending on the galvanization process the relative thickness of these layers can vary widely, explaining the seemingly random apparent conductivity of GSP. Theoretical modeling of these structures shows that their apparent conductivity scales linearly with the frequency, suggesting that it can be far lower than acknowledged so far. An extensive analysis of power-dissipation data from the literature of GSP-based reverberation chambers confirms these predictions, with multiple instances of apparent conductivities as low as 10 kS/m.The conclusion is not that GSP are hopelessly poorly conductive, but rather that care should be taken in selecting the right coating technology, not only based on corrosion protection and minimizing costs, but also in view of its impact on GSP conductivity.

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Power Loss in Reverberation Chambers by Antennas and Receivers

Cited by 7 publications

References 6 publications

Contactless Antenna Radiation Efficiency Measurement Within Reverberation Chambers: Sensitivity Improvement

Contactless Antenna Radiation Efficiency Measurement Within Reverberation Chambers: Sensitivity Improvement

Evaluation of equivalent conductivity of reverberation chambers wall

Understanding the Apparently Poor Conductivity of Galvanized Steel Plates

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