Abstract
In this paper, preliminary study on path loss characterization of in-vivo communication channel at 2.45 GHz using numerical modeling is presented. One of the antennas is implanted inside the chest and the second antenna is placed on the surface of body at certain distance. The on-body antenna is rotated at different angles with respect to the inbody antenna and path loss is calculated at certain fixed distance. The body-centric path loss is compared with the free space path loss as well. Results show that there is almost 10-15 dB variation in path loss in case of in-vivo channel as compared to free space. Also a degradation in path loss and channel response with respect to the orientation angle between implanted transmitter and on-body receiver is observed, which highlights the importance of carefully considering the location of on-body receiver for optimal system performance.
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