Abstract:Abstract-Antennas designed to link footwear sensors within body centric networks are introduced with two small UWB antennas, one directional and another quasi-omnidirectional. The radiating characteristics are evaluated for three positions on a sample sports shoe using a detailed simulation model and measurements with a homogenous foot phantom. Antenna performance is assessed for resilience to close proximity loading by the footwear materials and the phantom foot.
“…The antenna's geometry with matched impedance and radiation pattern performances for an on-body application is described in [7]. The selection of antenna geometry for footwear is dependent on the desired on-body radiation pattern from the position on the footwear.…”
Section: B Antennamentioning
confidence: 99%
“…Low power Ultra Wideband (UWB) devices have been investigated to enhance data rates while offering some inherent resilience to local propagation fading. Different antennas have been designed for UWB frequencies for different on-body area locations, such as the waist [4,5], chest [6], footwear [7] as well as for hand-portable devices. The on-body propagation channel is a dynamic channel considering different body postures [2] and different scenarios, where ground and wall reflections may improve the strength of the receive signal [3].…”
UWB antennas are suitable for on-body links in body area networks because of the low power, high data rates and short range. As defined in the Wireless Body Area Network (WBAN) Standard, impulse radio technology must provide a fidelity factor greater than 0.8 to ensure reliable communications. In this paper the fidelity factor of a directional and an omnidirectional antenna located on footwear are computed for different body area locations. The effects of different grounds on the fidelity factor are also considered.
“…The antenna's geometry with matched impedance and radiation pattern performances for an on-body application is described in [7]. The selection of antenna geometry for footwear is dependent on the desired on-body radiation pattern from the position on the footwear.…”
Section: B Antennamentioning
confidence: 99%
“…Low power Ultra Wideband (UWB) devices have been investigated to enhance data rates while offering some inherent resilience to local propagation fading. Different antennas have been designed for UWB frequencies for different on-body area locations, such as the waist [4,5], chest [6], footwear [7] as well as for hand-portable devices. The on-body propagation channel is a dynamic channel considering different body postures [2] and different scenarios, where ground and wall reflections may improve the strength of the receive signal [3].…”
UWB antennas are suitable for on-body links in body area networks because of the low power, high data rates and short range. As defined in the Wireless Body Area Network (WBAN) Standard, impulse radio technology must provide a fidelity factor greater than 0.8 to ensure reliable communications. In this paper the fidelity factor of a directional and an omnidirectional antenna located on footwear are computed for different body area locations. The effects of different grounds on the fidelity factor are also considered.
“…The technology that continuously observes elderlies or child's positions is practicable as a preventive technique of such an incident. The practical use of the GPS function loadings shoes is advanced to continuously observe the target person's position [1]. The antenna element is often stored in sole though the radiation efficiency decreases by user's foot in the GPS function loadings shoes.…”
Recently, the increase in aged wanderers or the infant abduction is becoming the serious social problem. The practical use of the GPS function loadings shoes is advanced to prevent such incident occurring. The shoes mountable dual-band antenna that can correspond to the GPS signal reception, and the uplink into the wide area network is proposed in this report. The GPS-band of the proposal antenna is used to acquire the positional information on shoes. On the other hand, acquired shoes positional information is uplinked to the wide area network by Wi-Fi-band, and is used to inform the police or the nurse.
“…Integrated ergonomic footwear antennas will have to support sustainable radio channels in electromagnetic environments with various material loads due to human tissues, footwear and ground surfaces with varying proximities and that may have high water content [10,11]. Additionally, footwear nodes are furthest from upper body nodes and their relative positions can change rapidly during leg movement with associated variations in path loss.…”
Section: Introductionmentioning
confidence: 99%
“…Ultra Wideband (UWB) performances for a monopole antenna and a Vivaldi antenna printed on 0.2 mm thick FR4 were reported for footwear toe-cap, heel counter (rear) and lateral-quarter (side) positions [10]. E-field plots illustrated the performance for several full-body postures and the ground surface influence for the heel-mounted Vivaldi.…”
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