Design and Experimental Validation of a Mode-Stirred Reverberation Chamber at Millimeter Waves

Fall, Abdou Khadir; Besnier, Philippe; Lemoine, Christophe; Zhadobov, Maxim; Sauleau, Ronan

doi:10.1109/temc.2014.2356712

Cited by 28 publications

(11 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a conventional RC operated at microwave regimes (~ up to 10 GHz), a 1° angular step size is typically used in ACS experiments. However, there is a limited scientific literature on the operation of an RC at mmWave frequencies [29,30]. We calculate the correlation coefficient between stir traces in a range of angles between 0.5 and 2 degrees.…”

Section: Resultsmentioning

confidence: 99%

Absorption cross section of building materials at mm wavelength in a reverberation chamber

Micheli

Delfini

Pastore

et al. 2017

Meas. Sci. Technol.

View full text Add to dashboard Cite

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. ABSTRACTThe reverberation chamber method is used to estimate the average absorption cross section of building materials at mmWave frequencies. Analysed samples include concrete, bricks of different types, and wood. The investigation is carried out in the frequency range between 50 GHz and 68 GHz, which is of interest in the next generation of mobile telecommunication system. A cylindrical cavity is transformed into a reverberation chamber through the use of a mechanical model stirrer. The chamber field is statistically homogeneous and depolarized; therefore it can be used to probe the average response of the sample under test. In particular, through a differential measure of the average quality factor (average insertion loss) it is possible estimate the fraction of power absorbed by the sample under test. Several cube-shape samples have been characterized and compared. Obtained results show that analysed samples have remarkably different levels of the electromagnetic wave absorption, depending on both material density and chemical composition. The absorption of pure water is used as a baseline to determine the dynamic range of the measurement.

show abstract

Section: Resultsmentioning

confidence: 99%

Absorption cross section of building materials at mm wavelength in a reverberation chamber

Micheli

Delfini

Pastore

et al. 2017

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Also, knowledge of the K factor can help refine the estimation of uncertainty for realistic chamber set-ups [11], [12], [24].…”

Section: Determining Measurement Parameters For Uncertainty Calcumentioning

confidence: 99%

“…Emission tests of different electrical components from 1 GHz to 40 GHz have been performed in [23]. In [24], the design and experimental R 0018-926X (c) 2015 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.…”

mentioning

confidence: 99%

Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Senić

Remley

Wang

et al. 2016

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

This contribution provides techniques for accurately characterizing uncertainty when measuring total radiated power at millimeter-wave frequencies. The setup is based on the reverberation chamber as a well-known measurement environment capable of performing total radiated power measurements of wireless devices. We show that by applying various stirring techniques, we can reduce the random component of measurement uncertainty to around 2%. We use a model for estimating the uncertainty for total radiated power measurements based on the K factor which is compared to uncertainties calculated from relative power measurements and we show excellent agreement. We perform a significance test to confirm that the uncertainty due to the limited number of mode-stirred samples dominates over the uncertainty due to the lack of spatial uniformity. The observed uncertainty is also compared to an ideal chamber situation and shows good agreement.Index Terms-Measurement uncertainty, millimeter wave, reverberation chamber, total radiated power, wireless systems.

show abstract

“…In 2015, we proposed the first mmW RC covering the 60 GHz band [Fall et al, ]. This proof‐of‐concept prototype was designed for general‐purpose electromagnetic compatibility testing and was not adapted for animal exposure.…”

Section: Introductionmentioning

confidence: 99%

Exposure Assessment in Millimeter‐Wave Reverberation Chamber Using Murine Phantoms

Fall

Lemoine

Besnier

et al. 2020

Bioelectromagnetics

Self Cite

View full text Add to dashboard Cite

This study deals with the design and calibration of the first mode-stirred reverberation chamber (RC) in the 60-GHz-band adapted for in vivo bioelectromagnetic studies. In addition to the interface for electromagnetic and thermal dosimetry, the interfaces for lighting and ventilation were integrated into the RC walls while preserving acceptable shielding. The RC with mechanical and electronic steering capabilities is characterized in the 55-65 GHz range. To this end, murine skinequivalent phantoms of realistic shape were designed and fabricated. Their complex permittivity is within ±12% of the target value of murine skin (6.19-j5.81 at 60 GHz). The quality factor of the RC loaded with an animal cage, bedding litter, and five murine phantoms was found to be 1.2 × 10 4 . The losses inside the RC were analyzed, and it was demonstrated that the main sources of the power dissipation were the phantoms and mice cage. The input power required to reach the average incident power density of 1 and 5 mW/cm 2 was found to be 0.23 and 1.14 W, respectively. Surface heating of the mice models was measured in the infrared (IR) range using a specifically designed interface, transparent at IR and opaque at millimeter waves (mmW). Experimental results were compared with an analytical solution of the heat transfer equation and to full-wave computations. Analytical and numerical results were in very good agreement with measurements (the relative deviation after 90 min of exposure was within 4.2%). Finally, a parametric study was performed to assess the impact of the thermophysical parameters on the resulting heating. Bioelectromagnetics. 2020;41:121-135.

show abstract

Design and Experimental Validation of a Mode-Stirred Reverberation Chamber at Millimeter Waves

Cited by 28 publications

References 30 publications

Absorption cross section of building materials at mm wavelength in a reverberation chamber

Absorption cross section of building materials at mm wavelength in a reverberation chamber

Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Exposure Assessment in Millimeter‐Wave Reverberation Chamber Using Murine Phantoms

Contact Info

Product

Resources

About