Abstract
An in vitro exposure setup developed to expose suspended cells in Petri dishes on a large frequency band up to a few gigahertz was studied. This system was based on far-field exposure with a horn antenna in an anechoic chamber. A specific incubator was designed with a water-cooling system for constant temperature inside the setup. Four exposed Petri dishes presented a similar specific absorption rate (SAR) distribution with a whole-volume SAR of $0.56 \pm 0.40~\hbox{W/kg/W}_{\rm inc}$ at 2.45 GHz. The incubator was equipped with a stirring mechanism allowing an homogenous distribution of temperature in the biological solution. The SAR was assessed over the 1.5–3 GHz frequency range. Using the temperature control and stirring, an increase of 0.4 $^\circ {\rm C}$ in temperature was observed after 2 h exposure at 2.45 GHz, 22 W incident power. This dosimetric study demonstrated the ability of this system to expose cells in suspension at different frequencies in a controlled environment .
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