| Περίληψη: | This research could play a vital role to the new promising application of artificial pancreas. More specifically, it presents a numerical and experimental electromagnetic study and channel characterization of an implanted antenna located upon the pancreas, transmitting data to a receiver that is located on the surface of the human body or at a specific distance in the 3-D space, for instance in a hospital room. Naturally, in order to make the above feasible, a complete study of the wireless channel must be performed so as to ensure proper communication and transfer of the important parameters. Regarding the antenna, it is intended for wireless data telemetry and power transmission operation within the Medical Device Radiocommunications Service band (MedRadio 402-405 MHz) and the Industrial, Scientific and Medical band (ISM, 902.8-928 MHz and 2.45 GHz) respectively. In our study, the commercial software HFSS by Ansys is used extensively. The implanted antenna design analysis is carried out inside the tissue of pancreas of a box-phantom that represents the human body. Furthermore, the study investigates the signal propagation of a system, that consists of two dipoles, over a sampled trajectory. In addition, simulation results with virtual human models are analyzed and depicted extensively. The above models are 3-D representations of human bodies and include all the necessary features, such as dielectric constants of the human organs for detailed experimental study of the signal that travels through the different organs. The computation of the electric field and power density fluctuations as the signal traverses within the human body have been carried, too.
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