Limits...
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

Comparison of data from channels 1, 6, and 9 in UDP mode with using (a) R52 and (b) R52n router board card.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4477099&req=5

fig9: Comparison of data from channels 1, 6, and 9 in UDP mode with using (a) R52 and (b) R52n router board card.

Mentions: Data rate was left unconstrained, but the cases of the test, in which the card was unable to transmit data at the maximum frequency, were marked with asterisks in the figure. As one can notice system breakdown often occurred for power over 18 dBm (70 mW). Results show that the UDP mode appeared slightly more appropriate compared to TCP mode in generating higher power for the R52n router board card and less appropriate for the R52 card. The two router board cards were also tested against the data rate, considering the three default channels that are most commonly used in commercial routers channels: channel 1, channel 6, and channel 9 (Figure 9). The tests were performed fixing the power (20 dBm or 100 mW) in UDP mode. Channel 9 was found to emit larger electric field than channel 1 and channel 6, for both R52 and R52n router board cards.


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)

Comparison of data from channels 1, 6, and 9 in UDP mode with using (a) R52 and (b) R52n router board card.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig9: Comparison of data from channels 1, 6, and 9 in UDP mode with using (a) R52 and (b) R52n router board card.
Mentions: Data rate was left unconstrained, but the cases of the test, in which the card was unable to transmit data at the maximum frequency, were marked with asterisks in the figure. As one can notice system breakdown often occurred for power over 18 dBm (70 mW). Results show that the UDP mode appeared slightly more appropriate compared to TCP mode in generating higher power for the R52n router board card and less appropriate for the R52 card. The two router board cards were also tested against the data rate, considering the three default channels that are most commonly used in commercial routers channels: channel 1, channel 6, and channel 9 (Figure 9). The tests were performed fixing the power (20 dBm or 100 mW) in UDP mode. Channel 9 was found to emit larger electric field than channel 1 and channel 6, for both R52 and R52n router board cards.

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