ID Number		122
Study Type		Engineering & Physics
Model		Theoretical model
Details		Theoretical calculation to determine EMI thresholds for cardiac pacemakers from cell phone RF emissions.Development and application of a procedure allowing the computation of the input impedance of an implanted pacemaker as well as the disturbing voltage generated by the external field sources. A realistic modelling of both the human body and the pacemaker leads to a very complicated boundary value problem. To circumvent this problem, the model is simplified in a special manner, described in the present study. Results: The investigation of the disturbing voltage exhibits a strong increase in the region up to 500 MHz. This effect can be explained by the introduction of image sources replacing the layer structure in the near field. Up to a frequency of 1500 MHz the disturbing voltage shows a quite complicated behaviour due to standing waves in the layer structure. For frequencies over 1500 MHz a monotone decrease can be observed because the losses of the tissue are dominant in this frequency region. Furthermore the distance dependence of the disturbing voltage was investigated. Start date May 1993, end date September 1995
Findings		Not Applicable to Bioeffects
Status		Completed Without Publication
Principal Investigator		University of Wuppertal, FRG - hansen@uni-wuppertal.de
Funding Agency		FGF, Germany
Country		GERMANY
References
Comments		FGF database ID# F2, FGF contract #s 5947, 5958, and 5982.