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Applied Sciences
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Substrate Integrated Waveguide (SIW) and Its Applications II
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Substrate Integrated Waveguide (SIW) and Its Applications II

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 May 2022) | Viewed by 12610

Special Issue Editor

Prof. Dr. Francesco Prudenzano

E-Mail Website
Guest Editor
Department of Electrical Engineering and Information, Entries Polytechnic University of Bari, Via Orabona, 4-70125 Bari, Italy
Interests: fiber optics; long period grating (LPG) fiber devices; rare-earth doped fiber laser; microwave photonics; microwave devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

During the last decade, substrate integrated waveguide (SIW) technology has been largely implemented for the construction of numerous microwave devices and circuits based on innovative solutions or re-proposing, by following a quasi-planar approach, well-known functionalities of classical waveguide-based components/systems. The possibility of fabricating shielded structures by employing planar geometries has provided an amazing way to fabricate innovative resonators exhibiting very high quality factors suitable for filter and oscillator applications, efficient radiating structures such as cavity-based antennas, miniaturized slot and horn antennas, compact coupling structures for multiplexing, multilayer/multi-way power dividers, wideband Magic-T, and so on. Multi-layered printed circuit board (PCB) or low-temperature co-fired ceramic (LTCC) technologies and the SIW approach allow a high feasibility, planar integration and packaging degree to be reached. As a consequence, the possibility of fabricating complex structures at low cost fulfils the increasing demand of highly sophisticated antennas for satellite communication, 5G and new generation wireless systems, terahertz systems, biomedicine, and a number of other applications.

Topics of interest to be covered by this Special Issue include, but are not limited to, the exploitation of SIW technology for:

  • Fabrication of microwave components;
  • Planar circuits integrations;
  • Planar antennas and beam-forming techniques;
  • Microwave photonics;
  • 5G and wireless systems;
  • Terahertz devices and systems;
  • Satellite communications;
  • Radar for automotive applications;
  • Microwave applicators and wearable devices for medicine.

Prof. Dr. Francesco Prudenzano
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. Applied Sciences 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

  • substrate integrated waveguide (SIW)
  • microwave components
  • planar circuits integrations
  • planar antennas
  • beam-forming techniques
  • microwave photonics
  • 5G systems
  • wireless systems
  • terahertz devices
  • satellite communications
  • radar for automotive applications
  • microwave applicators
  • wearable devices

Related Special Issue

Published Papers (4 papers)

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Research

18 pages, 6314 KiB  
Article
Substrate-Integrated Waveguide Microwave Sensor for Water-in-Diesel Fuel Applications
by Antonella Maria Loconsole, Vito Vincenzo Francione, Vincenza Portosi, Onofrio Losito, Michele Catalano, Attilio Di Nisio, Filippo Attivissimo and Francesco Prudenzano
Appl. Sci. 2021, 11(21), 10454; https://doi.org/10.3390/app112110454 - 07 Nov 2021
Cited by 10 | Viewed by 2266
Abstract
A water-in-diesel microwave sensor based on a substrate integrated waveguide (SIW) microwave applicator is designed and characterized in this study. The interaction between the microwave electromagnetic field and the diesel fuel contaminated with small concentrations of water is obtained via suitable radiating slots [...] Read more.
A water-in-diesel microwave sensor based on a substrate integrated waveguide (SIW) microwave applicator is designed and characterized in this study. The interaction between the microwave electromagnetic field and the diesel fuel contaminated with small concentrations of water is obtained via suitable radiating slots placed on the top of an SIW waveguiding structure. The SIW applicator working frequency is chosen by observing the behavior of the complex dielectric permittivity of the fuel–water blend based on a preliminary wide band investigation. The performances of the SIW microwave sensor are evaluated in terms of scattering parameter modulus |S21| as a function of the water concentration in ppm. The best sensitivity Δ|S21|Δρ=1.42 mdB/ppm is obtained at a frequency of f=9.76 GHz, with a coefficient of determination R2=0.94. The sensor is low-cost, low profile and ensures a good sensitivity for constant and real-time monitoring. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications II)
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9 pages, 930 KiB  
Article
Highly Compact Through-Wire Microstrip to Empty Substrate Integrated Coaxial Line Transition
by Marcos D. Fernandez, José A. Ballesteros and Angel Belenguer
Appl. Sci. 2021, 11(15), 6885; https://doi.org/10.3390/app11156885 - 27 Jul 2021
Cited by 1 | Viewed by 1459
Abstract
Empty substrate integrated coaxial line (ESICL) technology preserves the many advantages of the substrate integrated technology waveguides, such as low cost, low profile, or integration in a printed circuit board (PCB); in addition, ESICL is non-dispersive and has low radiation. To date, only [...] Read more.
Empty substrate integrated coaxial line (ESICL) technology preserves the many advantages of the substrate integrated technology waveguides, such as low cost, low profile, or integration in a printed circuit board (PCB); in addition, ESICL is non-dispersive and has low radiation. To date, only two transitions have been proposed in the literature that connect the ESICL to classical planar lines such as grounded coplanar and microstrip. In both transitions, the feeding planar lines and the ESICL are built in the same substrate layer and they are based on transformed structures in the planar line, which must be in the central layer of the ESICL. These transitions also combine a lot of metallized and non-metallized parts, which increases the complexity of the manufacturing process. In this work, a new through-wire microstrip-to-ESICL transition is proposed. The feeding lines and the ESICL are implemented in different layers, so that the height of the ESICL can be independently chosen. In addition, it is a highly compact transition that does not require a transformer and can be freely rotated in its plane. This simplicity provides a high degree of versatility in the design phase, where there are only four variables that control the performance of the transition. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications II)
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14 pages, 4897 KiB  
Article
SIW Cavity-Backed Antenna Array Based on Double Slots for mmWave Communications
by Bilal Hammu-Mohamed, Ángel Palomares-Caballero, Cleofás Segura-Gómez, Francisco G. Ruiz and Pablo Padilla
Appl. Sci. 2021, 11(11), 4824; https://doi.org/10.3390/app11114824 - 24 May 2021
Cited by 12 | Viewed by 4433
Abstract
This paper presents a cavity-backed antenna array in substrate integrated waveguide (SIW) technology in the millimeter-wave frequency band. The proposed antenna design uses double slots as radiating elements instead of conventional single slots. The double slots allow better control in the design of [...] Read more.
This paper presents a cavity-backed antenna array in substrate integrated waveguide (SIW) technology in the millimeter-wave frequency band. The proposed antenna design uses double slots as radiating elements instead of conventional single slots. The double slots allow better control in the design of the operating frequency bands of the cavity-backed antenna. The performance of the cavity-backed antennas with single and double slots is compared to assess the enhanced behavior of the double slots. As a proof of concept, a 2 × 2 array of cavity-backed antennas is designed, manufactured, and measured. Each cavity-backed antenna contains 2 × 2 double slots; thus, a 4 × 4 antenna array is considered. The experimental operating frequency band of the proposed antenna array ranges from 35.4 to 37 GHz. There is a good agreement between the simulated and measured results. The measured gain is around 17 dBi in the whole operating frequency band with a 75% total antenna efficiency. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications II)
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14 pages, 4498 KiB  
Article
A Split Ring Resonator-Based Metamaterial for Microwave Impedance Matching with Biological Tissue
by Vincenza Portosi, Antonella Maria Loconsole and Francesco Prudenzano
Appl. Sci. 2020, 10(19), 6740; https://doi.org/10.3390/app10196740 - 26 Sep 2020
Cited by 11 | Viewed by 3215
Abstract
A metamaterial lens based on a split ring resonator (SRR) array has been designed and optimized to improve the focusing and the penetration depth in human biological tissue of a microwave beam irradiated by a substrate integrated waveguide (SIW) cavity backed patch antenna. [...] Read more.
A metamaterial lens based on a split ring resonator (SRR) array has been designed and optimized to improve the focusing and the penetration depth in human biological tissue of a microwave beam irradiated by a substrate integrated waveguide (SIW) cavity backed patch antenna. The impedance matching of the antenna loaded with human tissue is strongly improved. The simulations have been performed by using CST Microwave Studio®. A prototype of the device has been fabricated with the printed board circuits (PCB) process and has been characterized using a Network Analyzer and an antenna measurement system in anechoic chamber. A novel microwave applicator for hyperthermia therapy of skin cancer could be developed. The performances of the proposed applicator have been evaluated in terms of measured S11 scattering parameter modulus and simulated power loss density. The obtained results indicate that an SRR-based metamaterial is a promising solution for external microwave applicators to employ in dermatology. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications II)
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