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Wearable Antennas and Wearable Wireless Communication Systems
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Wearable Antennas and Wearable Wireless Communication Systems

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Wearables".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 6329

Special Issue Editor

Prof. Dr. Stavros V. Georgakopoulos

E-Mail Website
Guest Editor
College of Engineering & Computing, Florida International University, Miami, FL 33174, USA
Interests: wireless power transfer; novel antennas; wearable antennas and body-centric wireless communications; on-chip antennas; antenna mutual coupling analysis; RFID; computational and applied electromagnetics; RF analysis and design; high frequency (HF) antennas; thin-film circuits; passive microwave devices

Special Issue Information

Dear Colleagues,

Wearable devices will play an important role in future wireless applications for communication, sensing, and health monitoring. Therefore, wearable antennas and wearable communication systems are crucial for the development of next-generation technologies that will transform our way of life through novel apps for communication, telemedicine, wearable medical devices, sensing of vital signs, and patient monitoring/diagnosis.

We invite authors to submit original research and review articles on the topics of wearable antennas and wireless communication systems that address important challenges in these topics and present novel solutions.

Potential topics include, but are not limited to:

  • Wearable antennas;
  • Wearable wireless power transfer systems;
  • Wearable wireless communication systems;
  • Wearable health monitoring and/or sensing systems;
  • Wearable wireless devices and sensor networks;
  • Human safety (standards and regulations for RF exposure).

Prof. Dr. Stavros V. Georgakopoulos
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

15 pages, 36119 KiB  
Article
A Frequency-Reconfigurable Filtenna for GSM, 4G-LTE, ISM, and 5G Sub-6 GHz Band Applications
by Wahaj Abbas Awan, Niamat Hussain, Sunggoo Kim and Nam Kim
Sensors 2022, 22(15), 5558; https://0-doi-org.brum.beds.ac.uk/10.3390/s22155558 - 25 Jul 2022
Cited by 20 | Viewed by 2248
Abstract
This paper presents the design and realization of a flexible and frequency-reconfigurable antenna with harmonic suppression for multiple wireless applications. The antenna structure is derived from a quarter-wave monopole by etching slots. Afterward, the high-order unwanted harmonics are eliminated by adding a filtering [...] Read more.
This paper presents the design and realization of a flexible and frequency-reconfigurable antenna with harmonic suppression for multiple wireless applications. The antenna structure is derived from a quarter-wave monopole by etching slots. Afterward, the high-order unwanted harmonics are eliminated by adding a filtering stub to the feedline to avoid signal interference. Lastly, frequency reconfigurability is achieved using pin diodes by connecting and disconnecting the stubs and the rectangular patch. The antenna is fabricated on the commercially available thin (0.254 mm) conformal substrate of Rogers RT5880. The proposed antenna resonates (|S11| < –10 dB) at five different reconfigurable bands of 3.5 GHz (3.17–3.82 GHz), 2.45 GHz (2.27–2.64 GHz), 2.1 GHz (2.02–2.29 GHz), 1.9 GHz (1.81–2.05 GHz), and 1.8 GHz (1.66–1.93 GHz), which are globally used for 5G sub-6 GHz in industrial, medical, and scientific (ISM) bands, 4G long-term evolution (LTE) bands, and global system for mobile communication (GSM) bands. The simulated and measured results show that the antenna offers excellent performance in terms of good impedance matching with controllable resonant bands, high gain (>2 dBi), stable radiation patterns, and efficiency (>87%). Moreover, the conformal analysis shows that the antenna retains its performance both in flat and bending conditions, making it suitable for flexible electronics. In addition, the antenna is compared with the state-of-the-art works for similar applications to show its potential for the targeted band spectrums. Full article
(This article belongs to the Special Issue Wearable Antennas and Wearable Wireless Communication Systems)
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18 pages, 9915 KiB  
Article
Low-Voltage DC-DC Converter for IoT and On-Chip Energy Harvester Applications
by Miroslav Potocny, Martin Kovac, Daniel Arbet, Michal Sovcik, Lukas Nagy, Viera Stopjakova and Richard Ravasz
Sensors 2021, 21(17), 5721; https://0-doi-org.brum.beds.ac.uk/10.3390/s21175721 - 25 Aug 2021
Cited by 4 | Viewed by 3295
Abstract
The power saving issue and clean energy harvesting for wireless and cost-affordable electronics (e.g., IoT applications, sensor nodes or medical implants), have recently become attractive research topics. With this in mind, the paper addresses one of the most important parts of the energy [...] Read more.
The power saving issue and clean energy harvesting for wireless and cost-affordable electronics (e.g., IoT applications, sensor nodes or medical implants), have recently become attractive research topics. With this in mind, the paper addresses one of the most important parts of the energy conversion system chain – the power management unit. The core of such a unit will be formed by an inductorless, low-voltage DC-DC converter based on the cross-coupled dynamic-threshold charge pump topology. The charge pump utilizes a power-efficient ON/OFF regulation feedback loop, specially designed for strict low-voltage start-up conditions by a driver booster. Taken together, they serve as the masters to control the charge pump output (up to 600 mV), depending on the voltage value produced by a renewable energy source available in the environment. The low-power feature is also ensured by a careful design of the hysteresis-based bulk-driven comparator and fully integrated switched-capacitor voltage divider, omitting the static power consumption. The presented converter can also employ the on-chip RF-based energy harvester for use in a wireless power transfer system. Full article
(This article belongs to the Special Issue Wearable Antennas and Wearable Wireless Communication Systems)
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