Review of the Wireless Capsule Transmitting and Receiving Antennas

Wang, Zhao; Lim, Eng Gee; Tillo, Tammam; Yu, Fangzhou

doi:10.5772/36625

Cited by 19 publications

(8 citation statements)

References 26 publications

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“…The antenna sensors are physical receptors that receive transmission data from the wireless capsule and transfer it to the IRU. Although there are different options made available by WCE manufacturing companies, 8-lead antenna array are the most widely used and are more effective [ 37 – 40 ]. The 8-lead antenna array is taped to the patient's anterior abdominal wall at eight specific points according to a standard designated pattern, as dictated by a template for lead placement [ 37 ].…”

Section: Framework Of the Proposed Systemmentioning

confidence: 99%

Mobile-Cloud Assisted Video Summarization Framework for Efficient Management of Remote Sensing Data Generated by Wireless Capsule Sensors

Mehmood

Sajjad

Baik

2014

Sensors

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Wireless capsule endoscopy (WCE) has great advantages over traditional endoscopy because it is portable and easy to use, especially in remote monitoring health-services. However, during the WCE process, the large amount of captured video data demands a significant deal of computation to analyze and retrieve informative video frames. In order to facilitate efficient WCE data collection and browsing task, we present a resource- and bandwidth-aware WCE video summarization framework that extracts the representative keyframes of the WCE video contents by removing redundant and non-informative frames. For redundancy elimination, we use Jeffrey-divergence between color histograms and inter-frame Boolean series-based correlation of color channels. To remove non-informative frames, multi-fractal texture features are extracted to assist the classification using an ensemble-based classifier. Owing to the limited WCE resources, it is impossible for the WCE system to perform computationally intensive video summarization tasks. To resolve computational challenges, mobile-cloud architecture is incorporated, which provides resizable computing capacities by adaptively offloading video summarization tasks between the client and the cloud server. The qualitative and quantitative results are encouraging and show that the proposed framework saves information transmission cost and bandwidth, as well as the valuable time of data analysts in browsing remote sensing data.

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Section: Framework Of the Proposed Systemmentioning

confidence: 99%

Mobile-Cloud Assisted Video Summarization Framework for Efficient Management of Remote Sensing Data Generated by Wireless Capsule Sensors

Mehmood

Sajjad

Baik

2014

Sensors

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“…However, designing the in-body antenna to operate at minimum power consumption and making it small is a challenging task [7]. Moreover, there are several requirements to fulfill for the antenna to be effective as a capsule antenna, including: miniaturization to achieve impedance matching at target frequency; spherical electric field distributions that enables transmission anywhere regardless of location of capsule or receiver; diverse polarization that allows efficient transmission regardless of capsule orientation; and straightforward tuning adjustment to compensate human body effect [8,9]. These can be achieved using helix antenna.…”

Section: Introductionmentioning

confidence: 99%

Effects of the permittivity and conductivity of human body for normal-mode helical antenna performance

Baharin

Uno

Arima

et al. 2019

IEICE Electron. Express

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In the capsule endoscope application, a coil type antenna namely a normal-mode helical antenna was used because of suitable shape to deploy in a cylindrical capsule. In antenna design, many human tissue conditions such as a stomach, fat and skin should be taken into account. Here, losses of human tissues are changed depending on personal differences and basic feature of the antenna in numerical simulation. At some tissue examples, antenna input resistance (R in) increases by the permittivity (ε r) and conductivity (σ) effect were shown. In order to establish antenna design method, physical mechanism of antenna input resistance increases should be clarified. In this paper, input resistance increases are numerically clarified for all changing conditions of permittivity and conductivity through electromagnetic simulations. As for an antenna, self-resonant normal-mode helical antenna of 0.2 wavelength is designed at 402 MHz. In the case of ε r = 11.6, the R in value of 0.63 Ω at σ = 0 [S/m] is increased to the maximum value of R in = 35 Ω at σ = 0.3 [S/m]. For understanding input resistance increases mechanism, electric field distributions around antenna are also shown. To ensure simulation adequateness, a measured result of input resistance is compared with simulated result.

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“…The application of WBANs is being expanded in medical services, national defense, wearable computing, and so on. Several frequency bands have been assigned for WBANs systems, such as the ultra-wideband (UWB: 3 $ 10 GHz) [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband textile antenna with circular polarization for GPS applications and wireless body area networks

Karimiyan-Mohammadabadi

Dorostkar²,

Shokuohi

et al. 2016

Journal of Industrial Textiles

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In this paper, a novel textile antenna with a semi elliptical ground plane is designed for ultra-wideband applications. Conductive woven fabric made of stainless steel/polyester (80/20%) spun yarn with 158 Ω/m linear resistance is used to design the ground and the patch of antenna. Moreover, the warp density and weft density of woven fabric are selected in a way that it gets high value of surface conductivity. The surface conductivity of woven fabric was 0.088 Ω/sq. The proposed antenna is made of triangle patch within a transmission line and its dimensions are optimized using the genetic algorithm. Results show that the proposed antenna achieves multi impedance bandwidth ranging from 1.4 to 1.6 GHz, 1.8 to 2.4 GHz, and 3.4 to 11.6 GHz (reflection coefficient <−10 dB). The antenna in both bands from 1.4 to 1.6 GHz and 1.8 to 2.4 GHz is circularly polarized. This impedance bandwidth makes it appropriate for many wireless communication systems such as GPS, Wifi, PCS-1900, IMT-2000/UMTS, and ultra-wideband applications.

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Review of the Wireless Capsule Transmitting and Receiving Antennas

Cited by 19 publications

References 26 publications

Mobile-Cloud Assisted Video Summarization Framework for Efficient Management of Remote Sensing Data Generated by Wireless Capsule Sensors

Mobile-Cloud Assisted Video Summarization Framework for Efficient Management of Remote Sensing Data Generated by Wireless Capsule Sensors

Effects of the permittivity and conductivity of human body for normal-mode helical antenna performance

Ultra-wideband textile antenna with circular polarization for GPS applications and wireless body area networks

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