University of Oulu

M. Särestöniemi, C. Pomalaza Raez, C. Kissi and J. Iinatti, "Propagation study of UWB capsule endoscope with multiple on-body antennas," 2021 15th International Symposium on Medical Information and Communication Technology (ISMICT), 2021, pp. 215-220, doi: 10.1109/ISMICT51748.2021.9434909

Propagation study of UWB capsule endoscope with multiple on-body antennas

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Author: Särestöniemi, Mariella1; Pomalaza Raez, Carlos2; Kissi, Chaïmaâ3;
Organizations: 1Center for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland
2Department of Electrical and Computer Engineering, Purdue University Fort Wayne, Indiana 46805, USA
3Electronics and Telecommunication Systems Research Group, National School of Applied Sciences (ENSA), Ibn Tofail University Kenitra, Morocco
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-08-04


This paper presents a study of the radio channel characteristics between a capsule endoscopy and a multi on-body antenna system on ultra wideband wireless body area networks (UWB-WBAN). Multiple on-body antennas are required to provide reliable communication link between the capsule and the on-body device, but also essential for capsule localization. The main aim is to study the variation of the frequency and time domain channel characteristics for the selected on-body antennas in different capsule locations, including the most challenging capsule locations deep inside the tissues or far away from most of the antennas. This study also evaluates whether five of selected type directive on-body antennas is enough to cover the intestine area thoroughly. The study is conducted with CST Studio Suite simulations and one of its anatomical voxel models. A simplified capsule model and a directive on-body antenna designed for low-band UWB in-body communications are used in this study. It is found that five of this type directive on-body antennas provide sufficient coverage over the intestine area even in the most challenging capsule locations. In certain capsule locations, the variation between the channel attenuations can be significant, over 40 dB within the frequency range of interest, if the capsule is located deep inside the tissues without smooth access to outer fat layer through which the signal could travel easily to different on-body antennas. Instead, if the capsule is located close to the subcutaneous fat layer, the channel attenuation is moderate even for the antennas which are located far from the capsule.

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Series: International Symposium on Medical Information and Communication Technology
ISSN: 2326-828X
ISSN-E: 2326-8301
ISSN-L: 2326-828X
ISBN: 978-1-7281-7724-3
ISBN Print: 978-1-7281-7725-0
Pages: 215 - 220
DOI: 10.1109/ISMICT51748.2021.9434909
Host publication: 15th International Symposium on Medical Information and Communication Technology (ISMICT), 14-16 April, 2021
Conference: International Symposium on Medical Information and Communication Technology
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work is supported in part by the projects WBAN Communications in the Congested Environments (MeCCE), the Academy of Finland 6Genesis Flagship (grant 318927) and the European Union’s Horizon 2020 programme under the Marie Sklodowska-Curie grant agreement No. 872752. Doc. Matti Hämäläinen is acknowledged for project management. Dr. Markus Berg is acknowledged for capsule antenna design. Dr. Marko Sonkki is acknowledged for his participation on the on-body antenna design.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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