Radiowave propagation characteristics of the intra-body channel at 2.38 GHz

El-Saboni, Yomna; Conway, Gareth A.; Cotton, Simon L.; Scanlon, William

doi:10.1109/bsn.2017.7936029

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Empirical evaluation of implant to implant channels in nonhomogeneous scenarios is mechanically challenging and requires sophisticated multi-layered phantoms. Therefore, most studies involving IBN channels have only utilized numerical modelling techniques [4], [5], but they have clearly demonstrated how the direct path is not necessarily dominant and that this varies notably from one application to the other according to operating frequency and node positioning.…”

Section: Measurement Of the Intra-body Channelmentioning

confidence: 99%

Experimental Investigation of Non-Line-of-Sight Channels in an Intra-Body Network at 2.38 GHz

El-Saboni

Zelenchuk

Conway

et al. 2019

2019 International Workshop on Antenna Technology (iWAT)

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Section: Measurement Of the Intra-body Channelmentioning

confidence: 99%

Experimental Investigation of Non-Line-of-Sight Channels in an Intra-Body Network at 2.38 GHz

El-Saboni

Zelenchuk

Conway

et al. 2019

2019 International Workshop on Antenna Technology (iWAT)

Self Cite

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“…Several studies proposing intrabody channel characteristics, channel models, as well as new intrabody antennas have recently been published e.g. in [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Measurement Data-Based Study on the Intrabody Propagation in the Presence of the Sternotomy Wires and Aortic Valve Implant

Särestöniemi

Pomalaza‐Ráez

Kumpuniemi

et al. 2019

IEEE Trans. Antennas Propagat.

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This paper presents a comprehensive study on the impact of sternotomy wires and a medical implant on the ultra-wideband (UWB) channel characteristics by studying intra-body propagation in the vicinity of on-body antennas. The main contribution on this work is to verify propagation path calculations with measurement data taken from a volunteer that has sternotomy wires and an aortic valve implant and from a reference volunteer without any implants. Furthermore, the impact of sternotomy wires and the aortic valve implant is confirmed by finite integration technique simulations using a tissue layer model. It is shown, that additional signal peaks and variations of the channel impulse responses are observed for the medical implant case, since both sternotomy wires and aortic valve implant contain highly conductive materials which impacts on the channel characteristics. In the time domain simulation results, the difference between the channel strength of the implanted and non-implanted cases varies between 5-17 dB within the time range corresponding to the relevant propagation paths. This phenomenon should be taken into account when designing on-body monitoring devices and when choosing sensor node locations to avoid interference due to the additional multipath propagated signal components. On the other hand, knowledge of the impact of the aortic valve implant may be utilized in the design of devices that can monitor the functionality of a valve implant during the heartbeat. Index Terms-Aortic valve implant, intra-body propagation, channel characteristics, sternotomy wires, wireless body area networks. Manuscript received March 8, 2018. This work has been funded by the project Wireless Body Area Networks Communications in the Congested Environments project at University of Oulu and in part Academy of Finland 6Genesis Flagship project (grant 318927).

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Fat in the Abdomen Area as a Propagation Medium in WBAN Applications

Särestöniemi

Raez

Kissi

et al. 2019

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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This paper presents a study on the fat in the abdomen area as a propagation medium in wearable and implant communications systems. Propagation via subcutaneous and visceral fat is considered separately. Simulations and measurements are done for both female and male bodies with the on-body antennas designed for in-body communications. Propagation paths are calculated and compared with the simulated and measured impulse responses. Furthermore, we analyze simulated 2D power flow figures, which illustrate the propagation inside the different tissues. It is shown that the signal propagates through the fat layer with minor losses compared to the other tissues of the studied cases. The signal propagates through the fat tissue from the abdomen area to the backside of person with 60 dB power loss. Additionally, the calculated fat layer propagation paths match well with the peaks of the simulated and measured impulse responses. The information about the fat as propagation medium is useful when designing the wireless and wired medical and health monitoring devices.

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Radiowave propagation characteristics of the intra-body channel at 2.38 GHz

Cited by 9 publications

References 14 publications

Experimental Investigation of Non-Line-of-Sight Channels in an Intra-Body Network at 2.38 GHz

Experimental Investigation of Non-Line-of-Sight Channels in an Intra-Body Network at 2.38 GHz

Measurement Data-Based Study on the Intrabody Propagation in the Presence of the Sternotomy Wires and Aortic Valve Implant

Fat in the Abdomen Area as a Propagation Medium in WBAN Applications

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