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Characterization and Evaluation of a Commercial WLAN System for Human Provocation Studies.

Zentai N, Fiocchi S, Parazzini M, Trunk A, Juhász P, Ravazzani P, Hernádi I, Thuróczy G - Biomed Res Int (2015)

Bottom Line: Finally, the specific absorption rate (SAR) generated by the CU was estimated computationally in the head of two human models.Results suggest that exposure to RF fields of WLAN systems strongly depends on the sets of the router configuration: the stability of the exposure was more constant and reliable when both antennas were active and vertically positioned, with best signal quality obtained with the R52n router board at channel 9, in UDP mode.The maximum levels of peak SAR were far away from the limits of international guidelines with peak levels found over the skin.

View Article: PubMed Central - PubMed

Affiliation: Department of Experimental Neurobiology, University of Pécs, 6 Ifjúság Útca, Pécs 7624, Hungary.

ABSTRACT
This work evaluates the complex exposure characteristics of Wireless Local Area Network (WLAN) technology and describes the design of a WLAN exposure system built using commercially available modular parts for the study of possible biological health effects due to WLAN exposure in a controlled environment. The system consisted of an access point and a client unit (CU) with router board cards types R52 and R52n with 18 dBm and 25 dBm peak power, respectively. Free space radiofrequency field (RF) measurements were performed with a field meter at a distance of 40 cm from the CU in order to evaluate the RF exposure at several signal configurations of the exposure system. Finally, the specific absorption rate (SAR) generated by the CU was estimated computationally in the head of two human models. Results suggest that exposure to RF fields of WLAN systems strongly depends on the sets of the router configuration: the stability of the exposure was more constant and reliable when both antennas were active and vertically positioned, with best signal quality obtained with the R52n router board at channel 9, in UDP mode. The maximum levels of peak SAR were far away from the limits of international guidelines with peak levels found over the skin.

No MeSH data available.


Related in: MedlinePlus

Typical radiation pattern of the WLAN exposure system performed by free space measurement at 20 dBm output power at d = 40 cm with both antennas active and in upright position (continuous line) and results of computational simulation of the same antenna arrangement (dotted line).
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fig2: Typical radiation pattern of the WLAN exposure system performed by free space measurement at 20 dBm output power at d = 40 cm with both antennas active and in upright position (continuous line) and results of computational simulation of the same antenna arrangement (dotted line).

Mentions: Figure 2 shows the electric field magnitude as measured from 40 cm distance with both antennas being active and kept in an upright position and also the results of a computational simulation using the same arrangement. An almost equivalent electric field magnitude was obtained comparing measurements and simulations (5.37 V/m, with an uncertainty of less than 2%).


Characterization and Evaluation of a Commercial WLAN System for Human Provocation Studies.

Zentai N, Fiocchi S, Parazzini M, Trunk A, Juhász P, Ravazzani P, Hernádi I, Thuróczy G - Biomed Res Int (2015)

Typical radiation pattern of the WLAN exposure system performed by free space measurement at 20 dBm output power at d = 40 cm with both antennas active and in upright position (continuous line) and results of computational simulation of the same antenna arrangement (dotted line).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4477099&req=5

fig2: Typical radiation pattern of the WLAN exposure system performed by free space measurement at 20 dBm output power at d = 40 cm with both antennas active and in upright position (continuous line) and results of computational simulation of the same antenna arrangement (dotted line).
Mentions: Figure 2 shows the electric field magnitude as measured from 40 cm distance with both antennas being active and kept in an upright position and also the results of a computational simulation using the same arrangement. An almost equivalent electric field magnitude was obtained comparing measurements and simulations (5.37 V/m, with an uncertainty of less than 2%).

Bottom Line: Finally, the specific absorption rate (SAR) generated by the CU was estimated computationally in the head of two human models.Results suggest that exposure to RF fields of WLAN systems strongly depends on the sets of the router configuration: the stability of the exposure was more constant and reliable when both antennas were active and vertically positioned, with best signal quality obtained with the R52n router board at channel 9, in UDP mode.The maximum levels of peak SAR were far away from the limits of international guidelines with peak levels found over the skin.

View Article: PubMed Central - PubMed

Affiliation: Department of Experimental Neurobiology, University of Pécs, 6 Ifjúság Útca, Pécs 7624, Hungary.

ABSTRACT
This work evaluates the complex exposure characteristics of Wireless Local Area Network (WLAN) technology and describes the design of a WLAN exposure system built using commercially available modular parts for the study of possible biological health effects due to WLAN exposure in a controlled environment. The system consisted of an access point and a client unit (CU) with router board cards types R52 and R52n with 18 dBm and 25 dBm peak power, respectively. Free space radiofrequency field (RF) measurements were performed with a field meter at a distance of 40 cm from the CU in order to evaluate the RF exposure at several signal configurations of the exposure system. Finally, the specific absorption rate (SAR) generated by the CU was estimated computationally in the head of two human models. Results suggest that exposure to RF fields of WLAN systems strongly depends on the sets of the router configuration: the stability of the exposure was more constant and reliable when both antennas were active and vertically positioned, with best signal quality obtained with the R52n router board at channel 9, in UDP mode. The maximum levels of peak SAR were far away from the limits of international guidelines with peak levels found over the skin.

No MeSH data available.


Related in: MedlinePlus