Giorgi Bit-Babik

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An electromagnetic analysis of a human head with EEG electrodes and leads exposed to RF-field sources was performed by means of Finite-Difference Time-Domain simulations on a 1-mm(3) MRI-based human head model. RF-field source models included a half-wave dipole, a patch antenna, and a realistic CAD-based mobile phone at 915 MHz and 1748 MHz. EEG(More)
The paper demonstrates a new way of overcoming the fundamental limit imposed on the fractional bandwidth of small antennas in relation to antenna volume by means of using a non-Foster (active) network. Unlike the techniques known in literature that use non-Foster matching circuits to broaden the operating bandwidth of electrically small antennas, the(More)
This paper presents the results of two computational large scale studies using highly realistic exposure scenarios, MRI based human head and hand models, and two mobile phone models. The objectives are (i) to study the relevance of age when people are exposed to RF by comparing adult and child heads and (ii) to analyze and discuss the conservativeness of(More)
Vehicle mounted antennas are widely used for mobile communication in multiple frequency bands. This paper investigates the effect of the variation in population on the Whole Body (WB) averaged SAR at frequencies between 30 MHz and 1 GHz in specific practical exposure conditions.
Primary intent of this study is development of realistic vascular structure and simulation of the blood perfusion in capillary. It is needed for precise thermal analysis using the modified bio-heat equation to provide better prediction of thermal response of tissues exposed to RF energy then in conventional Pennes model [1]. Particularly, motivation of this(More)
The technique to improve performance of specific GPS antennas on portable handsets by means of controlling the radiation pattern is presented in this paper. Location-based applications for handheld wireless communication devices may represent a significant revenue stream for cellular operators and may therefore add value to <i>global</i> <i>positioning</i>(More)
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