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An Over-Moded TEM Cell System for <i>in vivo</i> Exposure at 2.45 GHz

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Author(s): Alessandra Paffi | Caterina Merla | Micaela Liberti | Fabio Fratta | Rosanna Pinto | Giorgio A. Lovisolo | Francesca Apollonio

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 04;
Issue: 09;
Start page: 345;
Date: 2012;
Original page

Keywords: in vivo Experiments | Exposure System | TEM Cell | WiFi Signal

ABSTRACT
A TEM cell designed to operate at 900 MHz for exposing small-restrained animals (e.g. mice) has been theoretically, numerically and experimentally characterized at 2.45 GHz, which is the central frequency of the WiFi protocol. This study aims at evaluating the influence of higher order modes on the field homogeneity. The results demonstrate the superimposition of a tolerable standing wave, due to reflections at the cell terminations, and a slight beat wave due to the interference between different modes. Nevertheless, the final outcome is that the system can still be efficiently used to expose small animals in specific WiFi channels, provided they are properly placed in correspondence to the maxima of the electric field along the guide length.
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