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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

Measured electric field strength as a function of nominal data rate with UDP or TCP data transfer mode (as set by the router configuration utility) with using a R52 or R52n router board card. Only data for channel 1 are shown here to allow comparison between the different modes. A fixed power level of 20 dBm was used.
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fig7: Measured electric field strength as a function of nominal data rate with UDP or TCP data transfer mode (as set by the router configuration utility) with using a R52 or R52n router board card. Only data for channel 1 are shown here to allow comparison between the different modes. A fixed power level of 20 dBm was used.

Mentions: In order to further describe the WLAN system, performance measures on channel 1 were tested (Figure 7) in terms of electric field strength as a function of the nominal data rate of the different router board cards (R52 and R52n), using two different protocols (TCP and UDP). The RF power was fixed at 20 dBm. The best performances were obtained by using TCP mode and R52n router board card, which, at any data rate, achieved higher power than in the UDP mode and the R52 card.


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)

Measured electric field strength as a function of nominal data rate with UDP or TCP data transfer mode (as set by the router configuration utility) with using a R52 or R52n router board card. Only data for channel 1 are shown here to allow comparison between the different modes. A fixed power level of 20 dBm was used.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig7: Measured electric field strength as a function of nominal data rate with UDP or TCP data transfer mode (as set by the router configuration utility) with using a R52 or R52n router board card. Only data for channel 1 are shown here to allow comparison between the different modes. A fixed power level of 20 dBm was used.
Mentions: In order to further describe the WLAN system, performance measures on channel 1 were tested (Figure 7) in terms of electric field strength as a function of the nominal data rate of the different router board cards (R52 and R52n), using two different protocols (TCP and UDP). The RF power was fixed at 20 dBm. The best performances were obtained by using TCP mode and R52n router board card, which, at any data rate, achieved higher power than in the UDP mode and the R52 card.

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