Design and Theoretical Study of New Antennas

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 20995

Special Issue Editor

Special Issue Information

Dear Colleagues,

The emergence of nanotechnology is promising to revolutionise the semiconductor industry, offering a still greater reduction in the size of electronic components with better performance and lower energy consumption. Future mobile phones, personal computers, and other portable electronic devices will enjoy progressively greater size reduction and superior computational performance, but these improvements will be compromised by the existing antenna technology, that is, using conventional high-permittivity substrates, since miniaturisation of the antenna will result in degradation of both its bandwidth and efficiency. More exotic materials such as low-loss, high-epsilon ceramics may permit size reduction without much efficiency loss, but this still incurs reduction of bandwidth, and such materials are costly.

The primary aim of this Special Issue is to seek high-quality submissions that highlight recent breakthroughs in the development of design and theoretical Study of new antennas for future electronic transceivers.

The topics of interest include but are not limited to:

  • New materials for antennas and millimetre-wave systems;
  • Wideband antennas;
  • Antenna arrays;
  • MIMO and smart antennas;
  • Active and integrated antennas;
  • Adaptive and reconfigurable antennas;
  • Antennas/antenna arrays for energy harvesting and scavenging;
  • Antennas/antenna arrays measurement;
  • Advanced RF materials, meta-materials, metasurfaces and EBG;
  • Antennas/antenna arrays for 5G communications and the Internet of Things.

Dr. Chan H. See
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. Electronics 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 2400 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 (5 papers)

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Research

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6 pages, 2203 KiB  
Article
Triple-Band Uniform Circular Array Antenna for a Multi-Functional Radar System
by Ilkyu Kim, Sun-Gyu Lee and Jeong-Hae Lee
Electronics 2021, 10(12), 1488; https://doi.org/10.3390/electronics10121488 - 20 Jun 2021
Cited by 4 | Viewed by 2485
Abstract
A phased array radar has been developed toward an effective means for integrating multiple functionalities into one radar platform. The radar system necessitates the ability to operate at multiple frequencies simultaneously. In this paper, a triple-band uniform radial sub-array using a shared aperture [...] Read more.
A phased array radar has been developed toward an effective means for integrating multiple functionalities into one radar platform. The radar system necessitates the ability to operate at multiple frequencies simultaneously. In this paper, a triple-band uniform radial sub-array using a shared aperture antenna is proposed for a multi-functional radar system. An efficient placement of different radiating elements is realized based on the radial displacement of the circular array. In addition, multi-layer feed networks are used to reduce the intricacy of integrating several feed networks into one antenna. The reasonable matching characteristics and far-field gain are acquired at the S-band, C-band, and X-band. The measured results of the prototype are presented, and the results are compared to the simulation, which showed a good agreement. Full article
(This article belongs to the Special Issue Design and Theoretical Study of New Antennas)
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21 pages, 10383 KiB  
Article
Tilted Beam Fabry–Perot Antenna with Enhanced Gain and Broadband Low Backscattering
by Hassan Umair, Tarik Bin Abdul Latef, Yoshihide Yamada, Wan Nor Liza Binti Wan Mahadi, Mohamadariff Othman, Kamilia Kamardin, Mousa I. Hussein and Ali Imran Najam
Electronics 2021, 10(3), 267; https://doi.org/10.3390/electronics10030267 - 23 Jan 2021
Cited by 5 | Viewed by 2900
Abstract
Communication with low radar signature platforms requires antennas with low backscatter, to uphold the low observability attribute of the platforms. In this work, we present the design for a Fabry–Perot (F-P) cavity antenna with low monostatic radar cross section (RCS) and enhanced gain. [...] Read more.
Communication with low radar signature platforms requires antennas with low backscatter, to uphold the low observability attribute of the platforms. In this work, we present the design for a Fabry–Perot (F-P) cavity antenna with low monostatic radar cross section (RCS) and enhanced gain. In addition, peak radiation is tilted inthe elevation plane. This is achieved by incorporating phase gradient metasurface (PGM) with absorptive frequency selective surface (FSS). The periodic surface of metallic square loops with lumped resistors forms the absorptive surface, placed on top of a partially reflecting surface (PRS) with an intervening air gap. The double-sided PRS consists of uniform metallic patches etched in a periodic fashion on its upper side. The bottom surface consists of variable-sized metallic patches, to realize phase gradient. The superstrate assembly is placed at about half free space wavelength above the patch antenna resonating at 6.6 GHz. The antenna’s ground plane and PRS together construct the F-P cavity. A peak gain of 11.5 dBi is achieved at 13° tilt of the elevation plane. Wideband RCS reduction is achieved, spanning 5.6–16 GHz, for x- and y-polarizations of normally incident plane wave. The average RCS reduction is 13 dB. Simulation results with experimental verifications are presented. Full article
(This article belongs to the Special Issue Design and Theoretical Study of New Antennas)
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18 pages, 5988 KiB  
Article
Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure
by Omer Arabi, Chan Hwang See, Atta Ullah, Nazar Ali, Bo Liu, Raed Abd-Alhameed, Neil J. McEwan and Peter S. Excell
Electronics 2020, 9(8), 1307; https://doi.org/10.3390/electronics9081307 - 14 Aug 2020
Cited by 10 | Viewed by 4488
Abstract
A closely packed wideband multiple-input multiple-output (MIMO)/diversity antenna (of two ports) with a small size of less than 18.5 mm by 18.5 mm is proposed for mobile communication applications. The antenna can be orthogonally configured for corner installation or by placing it on [...] Read more.
A closely packed wideband multiple-input multiple-output (MIMO)/diversity antenna (of two ports) with a small size of less than 18.5 mm by 18.5 mm is proposed for mobile communication applications. The antenna can be orthogonally configured for corner installation or by placing it on a back-to-back structure for compact modules. To enhance the isolation and widen the bandwidth, the antenna is structured with multiple layers having differing dielectric constants. The feeding through a via significantly reduces the ground waves. A multi-fidelity surrogate model-assisted design exploration method is employed to obtain the optimized antenna geometric parameters efficiently. The antenna design was investigated using electromagnetic simulation and a physical realization of the optimal design was then created and subjected to a range of tests. The specific parameters investigated included reflection coefficients, mutual coupling between the input ports, radiation patterns, efficiency and parameters specific to MIMO behavior: envelope correlation coefficient and pattern diversity multiplexing coefficient. It was found that the antenna has an impedance bandwidth of approximately 4 GHz, mutual coupling between input ports of better than −18 dB and an envelope correlation coefficient of less than 0.002 across the operating band. This makes it a good candidate design for many mobile MIMO applications. Full article
(This article belongs to the Special Issue Design and Theoretical Study of New Antennas)
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11 pages, 4885 KiB  
Article
Enlarged Frequency Bandwidth of Truncated Log-Periodic Dipole Array Antenna
by Roman Kubacki, Mirosław Czyżewski and Dariusz Laskowski
Electronics 2020, 9(8), 1300; https://doi.org/10.3390/electronics9081300 - 13 Aug 2020
Cited by 6 | Viewed by 4252
Abstract
Many telecommunication applications require antennas capable of operating in a wide (or even ultrawide) frequency band. While LPDA (log-periodic dipole array) antennas are very practical in real-world applications, their usefulness is impeded due to frequency limitations caused by their truncated structures. To increase [...] Read more.
Many telecommunication applications require antennas capable of operating in a wide (or even ultrawide) frequency band. While LPDA (log-periodic dipole array) antennas are very practical in real-world applications, their usefulness is impeded due to frequency limitations caused by their truncated structures. To increase the upper-frequency range of the LPDA antenna, an additional parameter—the ratio factor—was introduced during the antenna geometry design process. This parameter allows us to improve the properties of an antenna with truncated geometry. In this paper, the proposed technique was used to design, manufacture and present an antenna capable of operating in a frequency range between 760 MHz to 18 GHz. The electrical properties of the proposed antenna were compared with a reference antenna. The designed antenna was experimentally validated, and the simulated results were verified as well. Full article
(This article belongs to the Special Issue Design and Theoretical Study of New Antennas)
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Review

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31 pages, 3734 KiB  
Review
Wireless Electromagnetic Radiation Assessment Based on the Specific Absorption Rate (SAR): A Review Case Study
by Mohamed Abdul-Al, Ahmed S. I. Amar, Issa Elfergani, Richard Littlehales, Naser Ojaroudi Parchin, Yasir Al-Yasir, Chan Hwang See, Dawei Zhou, Zuhairiah Zainal Abidin, Mohammad Alibakhshikenari, Chemseddine Zebiri, Fauzi Elmegri, Musa Abusitta, Atta Ullah, Fathi M. A. Abdussalam, Jonathan Rodriguez, Neil J. McEwan, James M. Noras, Russell Hodgetts and Raed A. Abd-Alhameed
Electronics 2022, 11(4), 511; https://doi.org/10.3390/electronics11040511 - 9 Feb 2022
Cited by 17 | Viewed by 5235
Abstract
Employing electromagnetic fields (EMFs) in new wireless communication and sensing technologies has substantially increased the level of human exposure to EMF waves. This paper presents a useful insight into the interaction of electromagnetic fields with biological media that is defined by the heat [...] Read more.
Employing electromagnetic fields (EMFs) in new wireless communication and sensing technologies has substantially increased the level of human exposure to EMF waves. This paper presents a useful insight into the interaction of electromagnetic fields with biological media that is defined by the heat generation due to induced currents and dielectric loss. The specific absorption rate (SAR) defines the heating amount in a biological medium that is irradiated by an electromagnetic field value. The paper reviews the radio frequency hazards due to the SAR based on various safety standards and organisations, including a detailed investigation of previously published work in terms of modelling and measurements. It also summarises the most common techniques utilised between 1978 and 2021, in terms of the operational frequency spectrum, bandwidth, and SAR values. Full article
(This article belongs to the Special Issue Design and Theoretical Study of New Antennas)
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