论文信息 - Numerical specific absorption rate analysis and measurement of a small indoor base station antenna

Numerical specific absorption rate analysis and measurement of a small indoor base station antenna

A comparison of different compliance rules for a small indoor base station antenna is presented at frequencies 1800, 2140, and 2450 MHz using a computational model. The numerical model of the antenna is validated using measurements of free space electric field values in close proximity of the antenna and specific absorption rate in a flat liquid phantom. Losses of the antenna are approximated using the measured radiation efficiency as a scaling factor between the input and output power of the antenna. The compliance distances are then computed using the reference levels for field values and equivalent power density. Obtained values are compared to the basic restriction limit in the upper torso of an anatomically realistic numerical model of a human body. The results show that in this case the reference level of maximum value of equivalent power density gives conservative compliance distances. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2516–2521, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23726

Sami Ilvonen | Ilkka Laakso | Tero Uusitupa | Tommi Toivonen | Tim Toivo

[1] A. Ahlbom. Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz) , 1998 .

[2] Stephen D. Gedney,et al. Convolution PML (CPML): An efficient FDTD implementation of the CFS–PML for arbitrary media , 2000 .

[3] R. W. Lau,et al. The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues. , 1996, Physics in medicine and biology.

[4] Sami Ilvonen,et al. Performance of convolutional PML absorbing boundary conditions in finite-difference time-domain SAR calculations , 2007, Physics in medicine and biology.

[5] S M Mann,et al. Public exposure to radio waves near GSM microcell and picocell base stations , 2006, Journal of radiological protection : official journal of the Society for Radiological Protection.

[6] P. Dimbylow. FDTD calculations of the whole-body averaged SAR in an anatomically realistic voxel model of the human body from 1 MHz to 1 GHz. , 1997, Physics in medicine and biology.