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Antenna Design and Microwave Engineering

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 October 2024) | Viewed by 3576

Special Issue Editors


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Guest Editor
Department of Electronics Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
Interests: millimeter waver antennas; RF components; Nyquist and oversampling data converters; DC–DC power converters; CMOS integrated circuits
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Republic of Korea
Interests: antennas; antenna design; antennas and propagation; electromagnetics; antenna engineering; microwave engineering; electromagnetic engineering; microwave technology; RF technologies; microwave

Special Issue Information

Dear Colleagues,

Welcome to the Special Issue of Applied Sciences on Antenna Design and Microwave Engineering. This collection of research articles serves as a comprehensive platform for sharing innovative advancements and breakthroughs in the fields of antennas and microwave engineering.

Antennas are the vital interface between electromagnetic waves and electronic systems, and their design is paramount for the efficient transmission and reception of data, be it for wireless communication, radar systems, satellite technology, or emerging IoT applications. Microwave engineering, on the other hand, plays a pivotal role in the development of high-frequency electronic components and systems, enabling seamless connectivity and high-speed data transfer.

This Special Issue brings together a diverse array of contributions covering topics ranging from novel antenna designs and modeling techniques to microwave components, advanced materials, and cutting-edge applications. We aim to stimulate discussions, inspire creativity, and foster collaboration in these rapidly evolving fields. We hope that the research presented here will inspire further progress and innovation in antenna design and microwave engineering.

We express our gratitude to all the authors for their valuable contributions and look forward to a rewarding exploration of the contents within this Special Issue. Topics of interest include, but are not limited to, the following:

  • Novel antenna designs;
  • Application specific antenna designs (MIMO, array, beamforming, multibeam antennas);
  • Reconfigurable intelligent surface (RIS) designs;
  • Antenna-on-chip (AoC) designs:
  • Microwave or baseband components;
  • Integrated circuits for RF systems;
  • Wireless communication systems.

Prof. Dr. Youngkyun Cho
Dr. Jungnam Lee
Guest Editors

Manuscript Submission Information

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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

  • novel antenna designs
  • application specific antenna designs (MIMO, array, beamforming, multibeam antennas)
  • reconfigurable intelligent surface (RIS) designs
  • antenna-on-chip (AoC) designs: microwave or baseband components
  • integrated circuits for RF systems
  • wireless communication systems

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Published Papers (3 papers)

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Research

14 pages, 4693 KiB  
Article
A Broadband Ultra High Frequency (UHF) Fat-Dipole Antenna for Digital TV Applications
by Marcelo B. Perotoni, Marcos S. Vieira and Giovane G. B. dos Santos
Appl. Sci. 2024, 14(24), 11679; https://doi.org/10.3390/app142411679 - 14 Dec 2024
Viewed by 582
Abstract
A broadband and compact planar UHF antenna is presented for use in MIMO Digital TV indoor applications. The choice of the element and its physical implementation is oriented towards a low-profile, low-cost, and single-layer deployment. Since it is intended to be used in [...] Read more.
A broadband and compact planar UHF antenna is presented for use in MIMO Digital TV indoor applications. The choice of the element and its physical implementation is oriented towards a low-profile, low-cost, and single-layer deployment. Since it is intended to be used in a 2 × 1 MIMO array, two antennas were constructed and tested to minimize their coupling to provide larger MIMO gains. Regarding the excitation, two different structures were evaluated to observe their impact on the final impedance profile. The option of an infinite balun provided a 62% fractional bandwidth (394 MHz to 747 MHz), covering the desired band and with good isolation levels when analyzed in the array. Results regarding MIMO parameters are provided herein, such as Envelope Correlation Coefficient and Total Active Reflection Coefficient, proving the potential of the proposed antenna array to be used in MIMO Digital TV applications in covering the UHF band. Full article
(This article belongs to the Special Issue Antenna Design and Microwave Engineering)
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26 pages, 6450 KiB  
Article
High-Gain Multi-Band Koch Fractal FSS Antenna for Sub-6 GHz Applications
by Atul Varshney and Duygu Nazan Gençoğlan
Appl. Sci. 2024, 14(19), 9022; https://doi.org/10.3390/app14199022 - 6 Oct 2024
Cited by 2 | Viewed by 1281
Abstract
This study introduces a novel antenna based on the binary operation of a modified circular patch in conjunction with the Koch fractal. The antenna is intended for applications in the sub-6 GHz band, partial C-band, and X-band. The low-cost antenna is fabricated on [...] Read more.
This study introduces a novel antenna based on the binary operation of a modified circular patch in conjunction with the Koch fractal. The antenna is intended for applications in the sub-6 GHz band, partial C-band, and X-band. The low-cost antenna is fabricated on a 1.6-mm-thick FR-4 substrate. A frequency-selective surface (FSS) is used to overcome the decreased values of the gain and bandwidth due to the fractal operations. The introduced split ring resonator (SRR) and the antenna substrate dimension reduction reduce the bandwidth and antenna gain. The air gap between the FSS and the antenna not only enhances the antenna gain but also controls the frequency tuning at the design frequency. The antenna size is miniaturized to 36.67%. A monopole antenna ground loaded with an SRR results in improved closest tuning (3.44 GHz) near the design frequency. The antenna achieves a peak gain of 9.37 dBi in this band. The FSS-based antenna results in a 4.65 dBi improvement in the gain value with the FSS. The measured and simulated plots exhibit an excellent match with each other in all three frequency bands at 2.96–4.72 GHz. These bands cover Wi-MAX (3.5 GHz), sub-6 GHz n77 (3300–3800 MHz), n78 (3300–4200 MHz), and approximately n79 (4400–4990 MHz), in addition to C-band applications. Full article
(This article belongs to the Special Issue Antenna Design and Microwave Engineering)
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14 pages, 5072 KiB  
Article
A Novel Wideband Splitter for a Four-Element Antenna Array
by Bohumil Adamec, Juraj Machaj and Peter Brida
Appl. Sci. 2024, 14(4), 1593; https://doi.org/10.3390/app14041593 - 17 Feb 2024
Cited by 1 | Viewed by 975
Abstract
In the paper, a novel design of a wideband power splitter for a four-element antenna array using two RF antiphase segments is proposed. Based on a detailed analysis of the power splitter circuit, an analytical model was set up in the MATLAB environment. [...] Read more.
In the paper, a novel design of a wideband power splitter for a four-element antenna array using two RF antiphase segments is proposed. Based on a detailed analysis of the power splitter circuit, an analytical model was set up in the MATLAB environment. The derived analytical model allows the development of a design of the described structure for any operating frequency and estimates the properties of the designed structure. In addition to the RF electrical part, the copper cover is also considered in this study. The copper cover serves as both a support and shielding part of the proposed structure. The electrical part consists of two sections of transmission lines. The first transmission line is symmetrical, while the second transmission line is asymmetrical. The given transmission lines can be realized using any technology (microstrip, coaxial, etc.). A prototype of the proposed wideband splitter operating at 650 MHz with a fractional bandwidth of 84.3% was designed and tested in real-world conditions to prove the concept. The board of the manufactured prototype has dimensions of 25 × 152 mm. A double-sided FR4 material with a substrate height of 1.48 mm, copper thickness of 50μm, and ϵr ≅ 4.3, with a dielectric loss tangent of 0.021 was used to manufacture the prototype. The prototype was tested and its parameters were verified in practical conditions as a part of the current radio communication system for the 5G band. Under these conditions, verification measurements of the proposed splitter with a four-element antenna array were carried out. Full article
(This article belongs to the Special Issue Antenna Design and Microwave Engineering)
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