UWB Path Loss Models for Ingestible Devices

Perez-Simbor, Sofia; Andreu, Carlos; Garcia-Pardo, Concepción; Frasson, Matteo; Cardona, Narcís

doi:10.1109/tap.2019.2891717

Cited by 37 publications

(38 citation statements)

References 33 publications

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“…During the measurement the transmitted signal power and relative position of transmitter and receiver units do not change over time. Furthermore, the UWB communications are also used for implantable sensors, for example, wireless capsule endoscopy [ 29 , 30 , 31 , 88 , 89 ].…”

Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

“…The most frequent application of UWB technology is vital signs monitoring, i.e., respiration rate (RR) and heart rate (HR) [ 12 , 19 , 25 , 78 , 79 , 82 , 101 ]. The most recent research focus on wireless in-body to on-body UWB communication, i.e., capsule endoscopy and tumor detection [ 28 , 29 , 30 , 31 , 88 , 89 ]. However, there is an increasing tendency that UWB technology, in addition to the sensing part, could be also used as a communication interface, thus meaning that only one sensor node is necessary for providing information about the human health status and for communication with an external base station.…”

Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

“…Recent research on UWB technology as a communication interface in WBAN systems, with an emphasis on in-body to on-body systems, is shown in Table 2 . As presented in Table 2 , there is an increasing number of studies of UWB applications in wireless capsule endoscopy [ 9 , 30 , 88 , 105 , 106 ] and implanted devices in general [ 3 , 107 ]. Due to its characteristics, UWB is suitable for implanted applications since it enables low power transmission and small physical dimension.…”

Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

See 2 more Smart Citations

Wireless Body Sensor Communication Systems Based on UWB and IBC Technologies: State-of-the-Art and Open Challenges

Čuljak

Vasić

Mihaldinec

et al. 2020

Sensors

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In recent years there has been an increasing need for miniature, low-cost, commercially accessible, and user-friendly sensor solutions for wireless body area networks (WBAN), which has led to the adoption of new physical communication interfaces providing distinctive advantages over traditional wireless technologies. Ultra-wideband (UWB) and intrabody communication (IBC) have been the subject of intensive research in recent years due to their promising characteristics as means for short-range, low-power, and low-data-rate wireless interfaces for interconnection of various sensors and devices placed on, inside, or in the close vicinity of the human body. The need for safe and standardized solutions has resulted in the development of two relevant standards, IEEE 802.15.4 (for UWB) and IEEE 802.15.6 (for UWB and IBC), respectively. This paper presents an in-depth overview of recent studies and advances in the field of application of UWB and IBC technologies for wireless body sensor communication systems.

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Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

Section: State Of the Art: Emerging Technologies For The Wbs Applimentioning

confidence: 99%

See 1 more Smart Citation

Wireless Body Sensor Communication Systems Based on UWB and IBC Technologies: State-of-the-Art and Open Challenges

Čuljak

Vasić

Mihaldinec

et al. 2020

Sensors

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“…Establishing a robust link between an in-body device and external equipment is a major challenge because of low radiation efficiencies (η ∼ 0.1%) due to high power dissipation in tissues [4], [5] and miniature size of the radiating elements. Moreover, efficient inbody antennas allow for minimization of measurement errors in path loss characterization in vivo [6]- [8], especially for deep-body applications or in large animals. In this frame, a wide range of antennas has been recently reported for bodyimplantable capsule applications, e.g.…”

Section: Introductionmentioning

confidence: 99%

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Nikolayev

Joseph

Skrivervik

et al. 2019

Antennas Wirel. Propag. Lett.

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Wireless implantable bioelectronics and accurate in vivo characterization of path loss require efficient and robust in-body antennas. Loading electric antennas with the effective permittivities higher than that of surrounding tissues is a promising solution. In this study, proof-of-concept conformal microstrip antennas are proposed. The antennas are optimized for a standard impedance of 50 Ω and operate in all high-watercontents tissues. Integral ground plane shields the antenna from inner circuitry. The radiation efficiencies are 0.4%, 2.2%, and 1.2% for the (434, 868, and 1400)-MHz designs, respectively, when computed in a 100-mm spherical phantom with muscleequivalent properties. The efficiencies are compared to the fundamental limitations and closely approaches them. Specific absorption rates are evaluated, and the corresponding maximum input power levels are established. Prototypes are fabricated and characterized to validate the design.

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“…On the other hand, this manuscript extracts the delay characteristics from the laboratory measurements and then these experimental measurements are compared with software simulations. Moreover, a previous characterization in frequency domain was performed in [6], [7], obtaining a formula for the system loss of the radio budget link for the low UWB frequency band (3.1 to 5.1 GHz). In previous, works the comparison between software simulations, phantom measurements and in vivo measurements showed a high level of agreement in frequency domain achieving very similar system loss model.…”

Section: Introductionmentioning

confidence: 99%

Initial Delay Domain UWB Channel Characterization for In-Body Area Networks

Perez-Simbor

Garcia-Pardo

Cardona

2019

2019 13th International Symposium on Medical Information and Communication Technology (ISMICT)

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Wireless Body Area Networks (WBANs) have increased the attention of the research community for the next generation wireless medical devices. Among others, Wireless Capsule Endoscopy (WCE) aims to transmit better quality images. For this, the Ultra Wideband (UWB) frequency band is becoming a good alternative to currently allocated frequencies for in-body networks, allowing higher data rate and having a low power transmission. Common channel characterization in WBANs are performed in frequency domain, i.e., analyzing the received power as a function of frequency. Nevertheless, indepth studies in delay domain analyzing the impulse response of the channel are barely considered in current literature. In this paper, an initial study in delay domain, i.e., the Power Delay Profile (PDP) characteristics, is performed. Moreover, a comparison between the channel response in frequency and delay domain is performed. This work gives an insightful view of the impulse response of the channel for in-body to on-body communications. For that, an extensive campaign of phantom measurements and software simulations are conducted.

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UWB Path Loss Models for Ingestible Devices

Cited by 37 publications

References 33 publications

Wireless Body Sensor Communication Systems Based on UWB and IBC Technologies: State-of-the-Art and Open Challenges

Wireless Body Sensor Communication Systems Based on UWB and IBC Technologies: State-of-the-Art and Open Challenges

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Initial Delay Domain UWB Channel Characterization for In-Body Area Networks

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