Flexible 2.4 GHz Node for Body Area Networks With a Compact High-Gain Planar Antenna

Wagih, Mahmoud; Wei, Yang; Beeby, Steve

doi:10.1109/lawp.2018.2880490

Cited by 44 publications

(41 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among the candidates for the antenna's fabrication methods are screen and inkjet-printing [11], woven or adhered conductive textiles and copper foils [8], [12], as well as etched copper laminates [13]. A high resolution process, producing smooth homogeneous conductors, is required to minimize manufacturing imperfections, as the feature size of mmWave antennas is commonly less than 1 mm.…”

Section: Antenna Design and Fabricationmentioning

confidence: 99%

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Wagih

Weddell

Beeby

2019

2019 IEEE Wireless Power Transfer Conference (WPTC)

Self Cite

View full text Add to dashboard Cite

Millimeter-Wave (mmWave) bands will be a key part of future 5G networks, with the 26 and 28 GHz bands being introduced first. The wide bandwidth aims to solve traffic-related issues. The projected high base-station density, highly directive transmitters, and the wide bandwidth make it a very promising RF energy harvesting (RFEH) source. Broadband antennas are necessary to harvest power efficiently from the full spectrum. This work presents the first antenna on textile for wearable ambient RFEH in the 26 GHz and 28 GHz bands. The antenna has an impedance bandwidth from 20 to 30 GHz, and exhibits a peak on-body gain of 7 dB with an omnidirectional radiation pattern for capturing ambient RF energy. The radiation efficiency on-and off-body was observed to be at least 40% and 60% respectively, between 24 and 30 GHz. A two-line microstrip dielectric characterization of the textile substrate in the mmWave band has been performed. The antenna has been fabricated on a 310 μm woven polyester substrate using etched ultra-thin Polyimide copper laminates with a minimum feature size of 150μm. A high robustness against human proximity has been demonstrated with a stable bandwidth and improved gain.

show abstract

Section: Antenna Design and Fabricationmentioning

confidence: 99%

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Wagih

Weddell

Beeby

2019

2019 IEEE Wireless Power Transfer Conference (WPTC)

Self Cite

View full text Add to dashboard Cite

show abstract

“…x (1) x (2) x (3) x (4) x (5) x (6) x (7) x (8) x (9) x (10) Objectives Table 1: x (1) (-), x (4) (ÁÁÁÁ), x (7) (---), and x (10) (-o-)…”

Section: Benchmarking and Discussionunclassified

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

Pietrenko‐Dabrowska

Koziel

2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

Design of microwave components is an inherently multiobjective task. Often, the objectives are at least partially conflicting and the designer has to work out a suitable compromise. In practice, generating the best possible trade‐off designs requires multiobjective optimization, which is a computationally demanding task. If the structure of interest is evaluated through full‐wave electromagnetic (EM) analysis, the employment of widely used population‐based metaheuristics algorithms may become prohibitive in computational terms. This is a common situation for miniaturized components, where considerable cross‐coupling effects make traditional representations (eg, network equivalents) grossly inaccurate. This article presents a framework for accelerated EM‐driven multiobjective design of compact microwave devices. It adopts a recently reported nested kriging methodology to identify the parameter space region containing the Pareto front and to render a fast surrogate, subsequently used to find the first approximation of the Pareto set. The final trade‐off designs are produced in a separate, surrogate‐assisted refinement process. Our approach is demonstrated using a three‐section impedance matching transformer designed for the best matching and the minimum footprint area. The Pareto set is generated at the cost of only a few hundred of high‐fidelity EM simulations of the transformer circuit despite a large number of geometry parameters involved.

show abstract

“…A textile-based super capacitor has been presented for storing harvested energy for wearable sensors [9]. In addition, flexible Radio Frequency (RF) front ends for wireless nodes have been specifically designed for onoff-body communication using standard license free protocols such as Bluetooth Low Energy [10]. In this work, we investigated a novel wearable gas sensor ( Figure 5), fabricated based on the fabrication process in [8].…”

Section: Requirements For Wearable Sensingmentioning

confidence: 99%

A Smart Cycling Platform for Textile-Based Sensing and Wireless Power Transfer in Smart Cities

Komolafe

Wagih

Valavan

et al. 2019

International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic Textiles

Self Cite

View full text Add to dashboard Cite

This paper proposes an integrated smart cycling system for assisted cycling, energy harvesting and wireless power transfer systems on a bicycle, an enabling platform for autonomous e-textiles-based sensing. The cyclist is assisted by a switched reluctance motor, which also acts as a switched reluctance generator that harvests a peak power of 7.5 W, at 10% efficiency during cycling to power on body sensors. To demonstrate wearable on-body sensing, a thin flexible CO2 gas sensor filament, which can be woven in fabric, is presented and evaluated. Wearable inductive resonant wireless power transfer (WPT) is achieved using textile embroidered coils on the bicycle’s handle and cycling gloves, achieving more than 80% WPT efficiency from the bicycle to the cyclist’s clothing, useful for powering mobile on-body sensors.

show abstract

Flexible 2.4 GHz Node for Body Area Networks With a Compact High-Gain Planar Antenna

Cited by 44 publications

References 13 publications

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

A Smart Cycling Platform for Textile-Based Sensing and Wireless Power Transfer in Smart Cities

Contact Info

Product

Resources

About