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On-body calibration and measurements using a personal, distributed exposimeter for wireless fidelity

Arno Thielens (UGent) , Sam Agneessens (UGent) , Hans De Clercq, Jeroen Lecoutere, Leen Verloock (UGent) , Emmeric Tanghe (UGent) , Sam Aerts (UGent) , Robert Puers, Hendrik Rogier (UGent) , Luc Martens (UGent) , et al.
(2015) HEALTH PHYSICS. 108(4). p.407-418
Author
Organization
Abstract
This paper describes the design, calibration, and measurements with a personal, distributed exposimeter (PDE) for the on-body detection of radio frequency (RF) electromagnetic fields due to Wireless Fidelity (WiFi) networks. Numerical simulations show that using a combination of two RF nodes placed on the front and back of the body reduces the 50% prediction interval (PI50) on the incident free-space electric-field strength E-RMS(free). Median reductions of 10 dB and 9.1 dB are obtained compared to the PI50 of a single antenna placed on the body using a weighted arithmetic and geometric average, respectively. Therefore, a simple PDE topology based on two nodes, which are deployed on opposite sides of the human torso, is applied for calibration and measurements. The PDE is constructed using flexible, dual-polarized textile antennas and wearable electronics, which communicate wirelessly with a Universal Serial Bus (USB) connected receiver and can be unobtrusively integrated into a garment. The calibration of the PDE in an anechoic chamber proves that the PI50 of the measured E-RMS(free) is reduced to 3.2 dB. To demonstrate the real-life usability of the wireless device, a subject was equipped with the PDE during a walk in the city of Ghent, Belgium. Using a sample frequency of 2 Hz, an average incident power density of 59 nW m(-2) was registered in the WiFi frequency band during this walk.
Keywords
ELECTROMAGNETIC-FIELD MEASUREMENTS, REALISTIC ENVIRONMENTS, EXPOSURE, SIMULATIONS, SAR, dosimetry, exposure, radiofrequency, radiation, non-ionizing, radiofrequency

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Citation

Please use this url to cite or link to this publication:

MLA
Thielens, Arno et al. “On-body Calibration and Measurements Using a Personal, Distributed Exposimeter for Wireless Fidelity.” HEALTH PHYSICS 108.4 (2015): 407–418. Print.
APA
Thielens, A., Agneessens, S., De Clercq, H., Lecoutere, J., Verloock, L., Tanghe, E., Aerts, S., et al. (2015). On-body calibration and measurements using a personal, distributed exposimeter for wireless fidelity. HEALTH PHYSICS, 108(4), 407–418.
Chicago author-date
Thielens, Arno, Sam Agneessens, Hans De Clercq, Jeroen Lecoutere, Leen Verloock, Emmeric Tanghe, Sam Aerts, et al. 2015. “On-body Calibration and Measurements Using a Personal, Distributed Exposimeter for Wireless Fidelity.” Health Physics 108 (4): 407–418.
Chicago author-date (all authors)
Thielens, Arno, Sam Agneessens, Hans De Clercq, Jeroen Lecoutere, Leen Verloock, Emmeric Tanghe, Sam Aerts, Robert Puers, Hendrik Rogier, Luc Martens, and Wout Joseph. 2015. “On-body Calibration and Measurements Using a Personal, Distributed Exposimeter for Wireless Fidelity.” Health Physics 108 (4): 407–418.
Vancouver
1.
Thielens A, Agneessens S, De Clercq H, Lecoutere J, Verloock L, Tanghe E, et al. On-body calibration and measurements using a personal, distributed exposimeter for wireless fidelity. HEALTH PHYSICS. 2015;108(4):407–18.
IEEE
[1]
A. Thielens et al., “On-body calibration and measurements using a personal, distributed exposimeter for wireless fidelity,” HEALTH PHYSICS, vol. 108, no. 4, pp. 407–418, 2015.
@article{6972151,
  abstract     = {This paper describes the design, calibration, and measurements with a personal, distributed exposimeter (PDE) for the on-body detection of radio frequency (RF) electromagnetic fields due to Wireless Fidelity (WiFi) networks. Numerical simulations show that using a combination of two RF nodes placed on the front and back of the body reduces the 50% prediction interval (PI50) on the incident free-space electric-field strength E-RMS(free). Median reductions of 10 dB and 9.1 dB are obtained compared to the PI50 of a single antenna placed on the body using a weighted arithmetic and geometric average, respectively. Therefore, a simple PDE topology based on two nodes, which are deployed on opposite sides of the human torso, is applied for calibration and measurements. The PDE is constructed using flexible, dual-polarized textile antennas and wearable electronics, which communicate wirelessly with a Universal Serial Bus (USB) connected receiver and can be unobtrusively integrated into a garment. The calibration of the PDE in an anechoic chamber proves that the PI50 of the measured E-RMS(free) is reduced to 3.2 dB. To demonstrate the real-life usability of the wireless device, a subject was equipped with the PDE during a walk in the city of Ghent, Belgium. Using a sample frequency of 2 Hz, an average incident power density of 59 nW m(-2) was registered in the WiFi frequency band during this walk.},
  author       = {Thielens, Arno and Agneessens, Sam and De Clercq, Hans and Lecoutere, Jeroen and Verloock, Leen and Tanghe, Emmeric and Aerts, Sam and Puers, Robert and Rogier, Hendrik and Martens, Luc and Joseph, Wout},
  issn         = {0017-9078},
  journal      = {HEALTH PHYSICS},
  keywords     = {ELECTROMAGNETIC-FIELD MEASUREMENTS,REALISTIC ENVIRONMENTS,EXPOSURE,SIMULATIONS,SAR,dosimetry,exposure,radiofrequency,radiation,non-ionizing,radiofrequency},
  language     = {eng},
  number       = {4},
  pages        = {407--418},
  title        = {On-body calibration and measurements using a personal, distributed exposimeter for wireless fidelity},
  url          = {http://dx.doi.org/10.1097/HP.0000000000000238},
  volume       = {108},
  year         = {2015},
}

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