Experimental Assessment of Specific Absorption Rate Using Room Electromagnetics

Bamba, Aliou; Joseph, Wout; Andersen, Jørgen Bach; Tanghe, Emmeric; Vermeeren, Günter; David, Paul A.; Nielsen, Jesper Ødum; Martens, Luc

doi:10.1109/temc.2012.2189572

Cited by 45 publications

(77 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Room electromagnetics theory is interesting, as it does not require complete knowledge of the propagation environment, and it offers an alternative description of diffuse scattering in a room using only simple parameters. Validation of room electromagnetic theory was investigated for cellular frequencies [18][19][20]. However, very few results are available in the analysis on frequency dependency of room electromagnetics.…”

Section: Introductionmentioning

confidence: 99%

Measured wideband characteristics of indoor channels at centimetric and millimetric bands

Fan

Carton

Nielsen

et al. 2016

J Wireless Com Network

View full text Add to dashboard Cite

Accurate characterization of spatial multipath channels at millimeter wave bands has gained significant interest both in industry and academia. A channel measurement was conducted at three different frequency bands, i.e., 2 − 4, 14 − 16, and 28 − 30 GHz in a line-of-sight (LOS) and an obstructed-LOS (O-LOS) scenarios in an empty room environment. A vector network analyzer connected to a virtual uniform circular array and to a rotational directional horn antenna was used in the measurements, respectively. Angle-of-arrivals and delay-of-arrivals of the multipath components were obtained from the measurements for the three frequency bands. Room electromagnetic properties for the three different frequencies at different propagation scenarios were investigated as well.

show abstract

Section: Introductionmentioning

confidence: 99%

Measured wideband characteristics of indoor channels at centimetric and millimetric bands

Fan

Carton

Nielsen

et al. 2016

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…In this section, the acquisition of absorption coefficient is presented [13], [15], [16]. As is mentioned above, the average absorptive coefficients of an indoor scenario can be calculated from the dimensions and reflective coefficients of materials.…”

Section: Average Absorption Coefficientmentioning

confidence: 99%

“…S o  o (f) can thus be simplified as S o . The human presence, which will result in a decrease of reverberation time in indoor scenarios, must also be taken into consideration [16]. To this end, the influence of human presence is included in the model using effective coefficients:…”

Section: Average Absorption Coefficientmentioning

confidence: 99%

Reverberation Time and Power Model in Indoor Wireless Scenarios

She¹,

Yu²,

Cui³

et al. 2018

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…There has been concern that a metallic enclosure could potentially act like an imperfect resonant cavity, leading to RF hot spots where the electromagnetic fields are enhanced [5,6]. This could increase the severity of the RF exposure for the Wi-Fi device usages in such an environment.…”

Section: Introductionmentioning

confidence: 99%

RF exposure analysis for multiple Wi-Fi devices in enclosed environment

Hwu¹,

Rhodes²,

deSilva³

et al. 2013

2013 IEEE Sensors Applications Symposium Proceedings

View full text Add to dashboard Cite

Abstract-Wi-Fi devices operated inside a metallic enclosure have been investigation in the recent years. A motivation for this study is to investigate wave propagation inside an enclosed environment such as elevator, car, aircraft, and spacecraft. There are performances and safety concerned that when the RF transmitters are used in the metallic enclosed environments. In this paper, the field distributions inside a confined room were investigated with multiple portable Wi-Fi devices. Computer simulations were performed using the rigorous computational electromagnetics (CEM). The method of moments (MoM) was used to model the mutual coupling among antennas. The geometrical theory of diffraction (GTD) was applied for the multiple reflections off the ground and walls. The prediction of the field distribution inside such environment is useful for the planning and deployment of a wireless radio and sensor system. Factors that affect the field strengths and distributions of radio waves in confined space were analyzed. The results could be used to evaluate the RF exposure safety in confined environment. By comparing the field distributions for various scenarios, it was observed that the Wi-Fi device counts, spacing and relative locations in the room are important factors in such environments. The RF Keep Out Zone (KOZ), where the electric field strengths exceed the permissible RF exposure limit, could be used to assess the RF human exposure compliance. As shown in this study, it's possible to maximize or minimize field intensity in specific area by arranging the Wi-Fi devices as a function of the relative location and spacing in a calculated manner.

show abstract

Experimental Assessment of Specific Absorption Rate Using Room Electromagnetics

Cited by 45 publications

References 12 publications

Measured wideband characteristics of indoor channels at centimetric and millimetric bands

Measured wideband characteristics of indoor channels at centimetric and millimetric bands

Reverberation Time and Power Model in Indoor Wireless Scenarios

RF exposure analysis for multiple Wi-Fi devices in enclosed environment

Contact Info

Product

Resources

About