University of Oulu

M. Särestöniemi, C. Pomalaza-Raez, K. Sayrafian and J. Iinatti, "In-Body Propagation at ISM and UWB Frequencies for Abdominal Monitoring Applications," 2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021, pp. 1-5, doi: 10.1109/ICCWorkshops50388.2021.9473828

In-body propagation at ISM and UWB frequencies for abdominal monitoring applications

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Author: Särestöniemi, Mariella1; Pomalaza-Raez, Carlos2; Sayrafian, Kamran3;
Organizations: 1Centre for Wireless Communications Department of Information Technology and Electrical Engineering, University of Oulu, Finland
2Department of Electrical and Computer Engineering, Purdue University Fort Wayne, Indiana 46805, USA
3Information Technology Laboratory, National Institute of Standards and Technology, USA
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-08-06


This paper presents the results of an in-body propagation study for abdominal implant communication using a bio-matched mini-horn antenna. The wireless signal coverage in the abdomen area at various ISM and UWB frequency bands are measured using electromagnetic simulations with a 3D anatomical voxel model. Power flow analysis is conducted to visualize propagation within the abdominal tissues at several frequencies. As an example, S-Parameters of the channel between a capsule endoscopy pill and an on-body receiver has been studied and channel attenuations at different frequencies are compared. Using the directional bio-matched antenna, it is observed that at 915 MHz the signal coverage in a horizontal plane is sufficient to almost include the whole small intestine. However, the depth of the coverage reduces substantially at higher frequency bands. This comparative analysis can provide some insight on the applicability of these frequencies for various abdominal monitoring applications. It can also provide some information about the required number and placement of the on-body receivers in order to ensure adequate signal reception.

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Series: IEEE International Conference on Communications workshop
ISSN: 2164-7038
ISSN-E: 2694-2941
ISSN-L: 2164-7038
ISBN: 978-1-7281-9441-7
ISBN Print: 978-1-7281-9442-4
Pages: 1 - 5
DOI: 10.1109/ICCWorkshops50388.2021.9473828
Host publication: 4th International Workshop on IoT Enabling Technologies in Healthcare (IoT Health Workshop). 14th June, 2021
Conference: IEEE International Conference on Communications
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: The work at the University of Oulu is supported by Academy of Finland 6Genesis Flagship (grant 318927) and the European Union’s Horizon 2020 programme under the Marie Sklodowska-Curie grant agreement No. 872752. Mikko Linnanmäki from ExcellAnt is acknowledged for UWB capsule antenna’s redesign. Mikko Parkkila and Uzman Ali from Radientum is acknowledged for mini-horn antenna re-design.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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