An analysis of the dependence of the electromagnetic exposure level in indoor environment on traffic direction, instantaneous data rate and position of the devices in a WLAN network

作者：Bechet Paul; Miclaus Simona^*; Bechet Andrei Cristian

来源：Measurement, 2015, 67: 34-41.

DOI：10.1016/j.measurement.2015.02.035

• Wireless Local Area Network (WLAN)
• Radiofrequency (RF) electromagnetic field
• Exposure assessment
• Stochastic signals
• Weighting method

The assessment of the exposure levels of humans in areas covered by Wireless Local Area Networks (WLANs) is a complex task. This is mainly due to the quasi-stochastic nature of the signals. With recently developed weighting procedures, realistic results were obtained for the electromagnetic field strength emitted by wireless emitting devices. Present work focuses on three main factors that influence the exposure level and follow their impact on the field strength. The original approach, that of experimental determination of the instantaneous data rate of transmission that is synchronized to the field level reading made by a time-amplitude measurement method, was able to detect some previous erroneous findings - that the duty cycle of transmission is mainly influenced by the data rate and therefore the prediction of the exposure level may be based on the data rate value evolution solely. It is shown here that only a multi-variable analysis based on specific developed experimental techniques is able to provide proper prediction capabilities when it comes to Wireless Fidelity (Wi-Fi) signals behavior in specific environments.

• 出版日期2015-5