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Electronics
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Antennas for Next-Generation Communication Systems
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Antennas for Next-Generation Communication Systems

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 November 2021) | Viewed by 31419

Special Issue Editors

Dr. Rashid Mirzavand

E-Mail Website
Guest Editor
Intelligent Wireless Technology Lab., University of Alberta, Edmonton, AB T6G 2R3, Canada
Interests: wireless communications; Internet of Things; intelligent sensors; microwave/mm-wave circuits; integrated antennas for 5G
Dr. Mohammad Saeid Ghaffarian

E-Mail Website
Guest Editor
Intelligent Wireless Technology Lab., University of Alberta, Edmonton, AB T6G 2R3, Canada
Interests: metamatiral antennas; phased array antenna; very compact antennas; RF/microwave circuits
Dr. Mohammad Mahdi Honari

E-Mail Website
Guest Editor
Intelligent Wireless Technology Lab., University of Alberta, Edmonton, AB T6G 2R3, Canada
Interests: RFID/microwave sensors; integrated circuits for 5G; surface modulated antennas; active integrated antennas; RF/microwave circuits.
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Low-cost and compact antennas and communication systems are being developed to support the increasing demand for wide bandwidth in next generation wireless communication networks (5G) and/or the Internet of Things (IoT). To achieve reliable, high data rate communication links, various methods have been introduced to enhance the directivity of planar antennas, enabling the next generation of high frequency and wireless communication. Considering the current attempts to apply 5G technology in the public market, such as in smart phones or smart city applications, the major concern is the ability to satisfy the fast rise in user and traffic capacity in mobile broadband communications. Therefore, smart antennas with intelligent beamforming capability have an important role in these areas. The purpose of this Special Issue is to present the latest technology and developments in antennas for the next-generation of communication systems. All researchers in the field are invited to contribute their original, unpublished works. Both research and review papers are welcome.

Topics of interest include but are not limited to:

  • Smart antennas:
    • antenna array design;
    • MIMO antennas;
    • multi beam antenna systems;
    • integrated phased array antennas;
    • antenna array optimization;
    • antenna calibration method;
    • channel modeling
  • Special, compact, and/or low-cost antennas:
    • green antennas;
    • sensor antennas;
    • terahertz planar antenna;
    • miniturized antenna for IOT systems;
    • very compact antenna for navigation systems;
    • transparent antennas;
    • intelligent antennas;
    • ultra wideband (UWB) antennas;
    • RFID antennas;
    • energy havesting antennas

Dr. Rashid Mirzavand
Dr. Mohammad Saeid Ghaffarian
Dr. Mohammad Mahdi Honari
Guest Editors

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.

Keywords

  • 5G
  • active
  • antenna
  • array
  • compact
  • device-to-device (D2D) communications
  • green technology
  • IoT
  • MIMO system
  • microwave
  • mm-wave
  • phased array
  • rectenna
  • RFID
  • sensor
  • smart
  • wireless

Published Papers (6 papers)

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Research

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13 pages, 2892 KiB  
Article
A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide
by Yalda Torabi, Gholamreza Dadashzadeh, Milad Hadeie, Homayoon Oraizi and Ali Lalbakhsh
Electronics 2021, 10(17), 2172; https://doi.org/10.3390/electronics10172172 - 6 Sep 2021
Cited by 15 | Viewed by 2752
Abstract
This paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with [...] Read more.
This paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with two different dielectric layers mounted on top of each other for performance improvement. The upper layer is a high permittivity RO6010 substrate to enhance the directivity as a superstrate and the lower layer is a low-permittivity RT/duroid 5880 substrate stacked on the alumina DIL to prevent the probable excitation of higher-order modes in the DIL channel. A 15-element linear array of radiating overlapped discs is used to mitigate the open stop-band (OSB) problem, fed by the mentioned waveguide, was designed and simulated at frequencies around 170 GHz. The dominant mode of the layered dielectric waveguide is perturbed by the infinite space harmonics generated by two sets of overlapped discs periodically sandwiched between the layers. It exhibited a relatively wide impedance bandwidth of 28.19% (157.5–206 GHz). Its radiation mechanism has been widely studied through simulations. The results revealed that the antenna provides a wide scanning capability through the broadside from −23° to 38°, covering the frequency range between 157.5 GHz and 201.5 GHz. For an array with 15 radiating elements, the simulated peak gain in the band is 15 dBi and the broadside gain is 13.6 dBi at 172 GHz. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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15 pages, 3001 KiB  
Article
Dual-Band/Dual-Mode Rat-Race/Branch-Line Coupler Using Split Ring Resonators
by Mohammad Saeid Ghaffarian, Gholamreza Moradi, Somayyeh Khajehpour, Mohammad Mahdi Honari and Rashid Mirzavand
Electronics 2021, 10(15), 1812; https://doi.org/10.3390/electronics10151812 - 28 Jul 2021
Cited by 4 | Viewed by 2370
Abstract
A novel dual-band/dual-mode compact hybrid coupler which acts as a dual-band branch-line coupler at the lower band and as a rat-race coupler at the higher band is presented in this paper. One of the most interesting features of the proposed structure is that [...] Read more.
A novel dual-band/dual-mode compact hybrid coupler which acts as a dual-band branch-line coupler at the lower band and as a rat-race coupler at the higher band is presented in this paper. One of the most interesting features of the proposed structure is that outputs of the proposed coupler in each mode of operation are on the same side. This unique design is implemented using artificial transmission lines (ATLs) based on open split ring resonators (OSRR). The low-cost miniaturized coupler could be operated as a dual-band 90° branch-line coupler at 3.3 and 3.85 GHz and 180° rat-race coupler at 5.3 GHz. The proposed coupler could be utilized in the antenna array feeding circuit to form the antenna beam. The structure’s analytical circuit design based on its equivalent circuit model is provided and verified by measurement results. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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15 pages, 10090 KiB  
Article
Profiled Horn Antenna with Wideband Capability Targeting Sub-THz Applications
by Jay Gupta, Dhaval Pujara and Jorge Teniente
Electronics 2021, 10(4), 412; https://doi.org/10.3390/electronics10040412 - 8 Feb 2021
Cited by 1 | Viewed by 6478
Abstract
This paper proposes a wideband profiled horn antenna designed using the piecewise biarc Hermite polynomial interpolation and validated experimentally at 55 GHz. The proposed design proves S11 and directivity better than −22 dB and 25.5 dB across the entire band and only [...] Read more.
This paper proposes a wideband profiled horn antenna designed using the piecewise biarc Hermite polynomial interpolation and validated experimentally at 55 GHz. The proposed design proves S11 and directivity better than −22 dB and 25.5 dB across the entire band and only needs 3 node points if compared with the well-known spline profiled horn antenna. Our design makes use of an increasing radius and hence does not present non-accessible regions from the aperture, allowing its fabrication with electro erosion techniques especially suitable for millimeter and submillimeter wavelengths. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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12 pages, 5747 KiB  
Article
Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms
by Mohammad Mahdi Honari, Mohammad Saeid Ghaffarian and Rashid Mirzavand
Electronics 2021, 10(1), 83; https://doi.org/10.3390/electronics10010083 - 4 Jan 2021
Cited by 17 | Viewed by 4222
Abstract
In this paper, a miniaturized ultra-wideband antipodal tapered slot antenna with exponential strip arms is presented. Two exponential arms with designed equations are optimized to reduce the lower edge cut-off frequency of the impedance bandwidth from 1480 MHz to 720 MHz, resulting in [...] Read more.
In this paper, a miniaturized ultra-wideband antipodal tapered slot antenna with exponential strip arms is presented. Two exponential arms with designed equations are optimized to reduce the lower edge cut-off frequency of the impedance bandwidth from 1480 MHz to 720 MHz, resulting in antenna miniaturization by 51%. This approach also improves antenna bandwidth without compromising the radiation characteristics. The dimension of the proposed antenna structure including the feeding line and transition is 158 × 125 × 1 mm3. The results show that a peak gain more than 1 dBi is achieved all over the impedance bandwidth (0.72–17 GHz), which is an improvement to what have been reported for antipodal tapered slot and Vivaldi antennas with similar size. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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17 pages, 4809 KiB  
Article
Design of MIMO Antenna with an Enhanced Isolation Technique
by Asif Khan, Suiyan Geng, Xiongwen Zhao, Zahoor Shah, Mishkat Ullah Jan and Mohamed Abdelkarim Abdelbaky
Electronics 2020, 9(8), 1217; https://doi.org/10.3390/electronics9081217 - 28 Jul 2020
Cited by 21 | Viewed by 8336
Abstract
The isolation between the microstrip patches has a great significance to examine the performance of the multiple-input-multiple-output (MIMO) antennas. The patch antennas are placed on the top of 1.46 mm thick Rogers RO3003 substrate having a length of 60 mm, a width of [...] Read more.
The isolation between the microstrip patches has a great significance to examine the performance of the multiple-input-multiple-output (MIMO) antennas. The patch antennas are placed on the top of 1.46 mm thick Rogers RO3003 substrate having a length of 60 mm, a width of 50 mm, and relative permittivity of 3. The distance between the resonators is 0.06λ and they are stimulated by two coaxial probes extended from the bottom ground layer. The defective ground structure of the H-shape slot is inserted on the bottom ground layer to achieve high isolation (mutual coupling reduction). The proposed MIMO antenna operates at 5.3 GHz frequency, which can be used for WiMAX, Wi-Fi, and future 5G services all over the world. The results of the designed structure have been simulated in a finite element method-based solver high-frequency structure simulator (HFSS). The simulated results show that the reflection coefficient (S11) and isolation (S21) at the desired frequency are −32 dB and −41 dB, respectively. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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Review

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24 pages, 1981 KiB  
Review
Resonant Cavity Antennas for 5G Communication Systems: A Review
by Azita Goudarzi, Mohammad Mahdi Honari and Rashid Mirzavand
Electronics 2020, 9(7), 1080; https://doi.org/10.3390/electronics9071080 - 1 Jul 2020
Cited by 36 | Viewed by 5796
Abstract
Resonant cavity antennas (RCAs) are suitable candidates to achieve high-directivity with a low-cost and easy fabrication process. The stable functionality of the RCAs over different frequency bands, as well as, their pattern reconfigurability make them an attractive antenna structure for the next generation [...] Read more.
Resonant cavity antennas (RCAs) are suitable candidates to achieve high-directivity with a low-cost and easy fabrication process. The stable functionality of the RCAs over different frequency bands, as well as, their pattern reconfigurability make them an attractive antenna structure for the next generation wireless communication systems, i.e., fifth generation (5G). The variety of designs and analytical techniques regarding the main radiator and partially reflective surface (PRS) configurations allow dramatic progress and advances in the area of RCAs. Adding different functionalities in a single structure by using additional layers is another appealing feature of the RCA structures, which has opened the various fields of studies toward 5G applications. This paper reviews the recent advances on the RCAs along with the analytical methods, and various capabilities that make them suitable to be used in 5G communication systems. To discuss different capabilities of RCA structures, some applicable fields of studies are followed in different sections of this paper. To indicate different techniques in achieving various capabilities, some recent state-of-the-art designs are demonstrated and investigated. Since wideband high-gain antennas with different functionalities are highly required for the next generation of wireless communication, the main focus of this paper is to discuss primarily the antenna gain and bandwidth. Finally, a brief conclusion is drawn to have a quick overview of the content of this paper. Full article
(This article belongs to the Special Issue Antennas for Next-Generation Communication Systems)
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