University of Oulu

C. Kissi, M. Särestöniemi, T. Kumpuniemi, S. Myllymäki, M. Sonkki, J.-P. Mäkelä, M. N. Srifi, H. Jantunen, and C. Pomalaza-Raez, "Receiving UWB Antenna for Wireless Capsule Endoscopy Communications," Progress In Electromagnetics Research C, Vol. 101, 53-69, 2020. doi:10.2528/PIERC19122204

Receiving UWB antenna for wireless capsule endoscopy communications

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Author: Kissi, Chaïmaâ1; Särestöniemi, Mariella2; Kumpuniemi, Timo2;
Organizations: 1Electronic Electronics and Telecommunication Systems Research Group, National School of Applied Sciences (ENSA), Ibn Tofail University, Kenitra, Morocco
2Centre for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, Finland
3Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Finland
4Department of Electrical and Computer Engineering, Purdue University, Fort Wayne, Indiana 46805, USA
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
Persistent link:
Language: English
Published: EMW Publishing, 2020
Publish Date: 2020-07-10


Wireless capsule endoscopy systems utilize a combination of hardware and software devices to ensure the healthcare of a human being. In praise of involved antennas in the overall medical system design, UWB (Ultra-Wideband) range occupies highest ranks in the literature. The low-band of UWB is regarded as the best frequency range, within the approved standards, to realize the better transmission of captured medical images by the capsule inside the SI tract, in terms of high resolution and low-path loss. A variety of passive capsules have been designed and made available in the literature, while the accurate design of the corresponding on-body antenna is lagging. For this purpose, this paper provides an extended study of a recently published on-body antenna operating at 3.75—4.25 GHz band. The measured antenna realizes good directivity of 5.78 dBi and 9.50 dBi towards the body without and with the cavity, respectively. The direction of the proposed on-body antenna beam is targeted to be mounted on the body surface. On-body simulations were run with CST Microwave Studio by involving an abdominal multi-layer model, and followed by navel and back areas of the voxel model to predict the antenna behavior close to different lossy body environments. Later, the antenna structure was measured next to a real human abdomen. Simulation results reveal that the proposed antenna with or without the cavity enables enhanced in-body communication when mounted on the abdomen with less path loss. This is supported by the low power totaling 20 dB at the SI (Small Intestine) tract. Furthermore, on-body measurements confirm the good antenna performance. Consequently, the planar compact antenna is regarded as a good on-body candidate for wireless capsule endoscopy systems.

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Series: Progress in electromagnetics research. C
ISSN: 1937-8718
ISSN-E: 1937-8718
ISSN-L: 1937-8718
Volume: 101
Pages: 53 - 69
DOI: 10.2528/PIERC19122204
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This research was funded by the Academy of Finland 6 Genesis Flagship, grant number 318927.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
Copyright information: © The Authors 2020.