Model and channel characteristics of near field inter-body coupling communication

Zhang, Xu; Song, Yong; Ren, Wei; Zhao, Yufei; Chen, Yu; Zhu, Wangwang; Zhou, Dongliang; Li, Changxiang

doi:10.1016/j.aeue.2022.154385

Cited by 2 publications

(11 citation statements)

References 23 publications

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“…The accuracies of these equations were validated through physical experiments and finite element simulations. The value of C air was determined primarily by the physical size and distance of the transceiver grounds, as shown in fitting Equation (13). The accuracy of this equation was also verified through physical experiments and finite element simulations.…”

Section: Summary and Discussionmentioning

confidence: 95%

“…Therefore, the electromagnetic fields emitted by the system, composed of electrodes and the human body, are limited to the near-field region [16]. According to our previous research results [13], a sphere-like area surrounding the TX in the presence of the bodies is defined as the near-field region. A strong coupling between two bodies occurs when the body of RX approaches the near-field region.…”

Section: Retrieval and Analysis Of Core Parameters Based On The Trans...mentioning

confidence: 99%

“…The simulation setup is as described in Section 3.1. Furthermore, the fitting equation describing the relationship between C air , the relative distance d (m), and the area S air (m 2 ) is also obtained, as shown in Equation (13), where ε 0 is the vacuum permittivity, ε r is the relative permittivity of the substance between transceiver grounds, and l (m) represents the longer side length of the ground of the transceiver.…”

Section: The Return Pathmentioning

confidence: 99%

“…A strategy for balancing the trade-off between the risks of disease transmission and data security has been proposed, namely, near-field inter-body coupling communication (NF-IBCC) [ 13 ]. This strategy adopts the concept of near-field intra-body communication (NF-IBC), also referred to as human body communication (HBC), which provides advantages such as low power consumption and high data security.…”

Section: Introductionmentioning

confidence: 99%

“…Figure13. The gain of the return path in the NF-IBCC system after being replaced by a 30pF capacitor.…”

mentioning

confidence: 99%

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The Retrieval and Effect of Core Parameters for Near-Field Inter-Body Coupling Communication

Zhang

Song

Zhou

et al. 2023

Sensors

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The potential of the Internet of Body (IoB) to support healthcare systems in the future lies in its ability to enable proactive wellness screening through the early detection and prevention of diseases. One promising technology for facilitating IoB applications is near-field inter-body coupling communication (NF-IBCC), which features lower power consumption and higher data security when compared to conventional radio frequency (RF) communication. However, designing efficient transceivers requires a profound understanding of the channel characteristics of NF-IBCC, which remain unclear due to significant differences in the magnitude and passband characteristics of existing research. In response to this problem, this paper clarifies the physical mechanisms of the differences in the magnitude and passband characteristics of NF-IBCC channel characteristics in existing research work through the core parameters that determine the gain of the NF-IBCC system. The core parameters of NF-IBCC are extracted through the combination of transfer functions, finite element simulations, and physical experiments. The core parameters include the inter-body coupling capacitance (CH), the load impedance (ZL), and the capacitance (Cair), coupled by two floating transceiver grounds. The results illustrate that CH, and particularly Cair, primarily determine the gain magnitude. Moreover, ZL mainly determines the passband characteristics of the NF-IBCC system gain. Based on these findings, we propose a simplified equivalent circuit model containing only core parameters, which can accurately capture the gain characteristics of the NF-IBCC system and help to concisely describe the channel characteristics of the system. This work lays a theoretical foundation for developing efficient and reliable NF-IBCC systems that can support IoB for early disease detection and prevention in healthcare applications. The potential benefits of IoB and NF-IBCC technology can, thus, be fully realized by developing optimized transceiver designs based on a comprehensive understanding of the channel characteristics.

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Section: Summary and Discussionmentioning

confidence: 95%

Section: Retrieval and Analysis Of Core Parameters Based On The Trans...mentioning

confidence: 99%

Section: The Return Pathmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Figure13. The gain of the return path in the NF-IBCC system after being replaced by a 30pF capacitor.…”

mentioning

confidence: 99%