New Trends in Antennas and Propagation: Theory, Material, Technology, and Applications for Future Systems

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: 20 July 2024 | Viewed by 1735

Special Issue Editors

Dr. Ramiro Samano Robles
E-Mail Website
Guest Editor
Centro de Investigação em Sistemas Confiáveis e de Tempo-Real, Porto, Portugal
Interests: distributed mimo; RFID; Internet of Things (IoT); radio-over-fibre distributed antenna systems; cooperative systems; cognitive radio
Dr. Jianxing Li
E-Mail Website
Guest Editor
School of Information and Commnuications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: multi-functional microwave; mmWave passive components; wireless power transfer
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Special Issue Information

Dear Colleagues,

Wireless applications are proliferating around the world, providing pervasive connectivity to an exponentially increasing number of objects with embedded processing capabilities. A new wave of stringent connectivity requirements is emerging from applications related to critical infrastructure, such as autonomous vehicles, drones, industrial machines, and remotely controlled robots. A fundamental part of all wireless technologies is the antenna system, which is in control of efficiently transforming the radiation energy to/from the signal processed/generated by the radio circuit units. The field of antennas and propagation is expected to experience a new revolution, sparked by the need for greater bandwidths, higher energetic efficiency, reduced latency, enhanced reliability, and higher security. This revolution includes novel sustainable fabrication techniques, joint propagation–antenna design and control, and new design and optimization tools, such as artificial intelligence. The applications of antennas range from body area networks, identification, positioning, satellite transmission, beamforming, remote control, sensing and operation.

Future wireless systems for 6G attempt to not only control the transmit/reception chain, as in legacy systems, but also control the propagation environment by using intelligent surfaces that can modify the induced/reflected waves and therefore achieve a new limit in capacity and efficiency. Antenna technology is expected to be exploited to new levels with such intelligent reflecting surfaces. We also expect to see a greater interaction between antenna design technologies and propagation characteristics, particularly in light of the future generation systems aiming to modify and optimize both approaches.

This Special Issue addresses the new trends in antenna system design, as well as propagation issues that have an impact on antenna design considering the evolution of these systems towards application in multiple areas, ranging from identification, detection, mobility, satellite, broadband transmission, low-power sensor design, RFID, the Internet of Things, etc. This Special Issue welcomes the contribution of articles that address the following areas of interest:

  • Innovative materials and fabrication process of antennas
  • Electromagnetic design of antennas
  • Reflective intelligent surfaces
  • AI for antenna design
  • Vehicular propagation modelling for multiple antennas
  • Cooperative MIMO
  • V2v MIMO channel modelling
  • Shaped surfaces
  • V2x applications of antennas
  • Patch antenna design
  • THz communications
  • Antenna optimization
  • Cellular system design
  • Massive MIMO
  • Antenna design for millimeter wave bands
  • Beamforming algorithms
  • Interference cancellation techniques

Dr. Ramiro Samano Robles
Dr. Jianxing Li
Guest Editors

Manuscript Submission Information

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Published Papers (3 papers)

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Research

20 pages, 13093 KiB  
Article
Duration of Rainfall Fades in GeoSurf Satellite Constellations
Appl. Sci. 2024, 14(5), 1865; https://doi.org/10.3390/app14051865 - 24 Feb 2024
Viewed by 205
Abstract
We have studied the stochastic processes A and B concerning fade durations due to rain, by simulating attenuation time series A(t) (dB) in the zenith paths of GeoSurf satellite constellations, at sites located in different climatic regions, with the Synthetic [...] Read more.
We have studied the stochastic processes A and B concerning fade durations due to rain, by simulating attenuation time series A(t) (dB) in the zenith paths of GeoSurf satellite constellations, at sites located in different climatic regions, with the Synthetic Storm Technique. Process B gives the statistics of outages (occurrences) and process A gives the statistics of outage duration (fraction of time), for the same rain attenuation threshold A(t)>S. The two processes are not independent; therefore, we have studied the relationship between their probabilities and defined a uniformity index 0<U(S)1. U(S) is useful for comparing real cases–fade durations fragmented in many different intervals, with changing S and site—and the limiting case of all fades lasting the same time. As S increases, U(S) increases, approaching 1 at very large thresholds. These results should guide the designers of satellite constellations to consider the impact of A(t) on diverse communications services. Process B (occurrences) impacts mainly on non–real-time services, such as data delivery, more disturbed by the number of outages rather than by their duration. Process A (fraction of time) impacts mainly on real–time services such as television, video conference etc., more disturbed by the duration of the outage. Full article
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15 pages, 9888 KiB  
Article
A Novel Approach to the Production of Printed Patch Antennas
Appl. Sci. 2024, 14(4), 1556; https://doi.org/10.3390/app14041556 - 15 Feb 2024
Viewed by 356
Abstract
This paper presents the manufacturing of a patch antenna using an advanced 3D printing technology called lights-out digital additive manufacturing (LDM). This 3D LDM printing technology is mainly used for printing circuit boards (PCBs); however, it has also been used to print a [...] Read more.
This paper presents the manufacturing of a patch antenna using an advanced 3D printing technology called lights-out digital additive manufacturing (LDM). This 3D LDM printing technology is mainly used for printing circuit boards (PCBs); however, it has also been used to print a patch antenna from conductive (CI) and dielectric ink (DI). This 3D LDM-printed antenna was compared with antennas on different dielectric substrates (Arlon 25N and FR4). The obtained results are compared and analyzed in this paper. Full article
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12 pages, 5664 KiB  
Article
Low-Profile Dual-Polarized Antenna Integrated with Horn and Vivaldi Antenna in Millimeter-Wave Band
Appl. Sci. 2023, 13(17), 9627; https://doi.org/10.3390/app13179627 - 25 Aug 2023
Viewed by 866
Abstract
In this paper, a dual-polarized antenna based on a substrate-integrated waveguide (SIW) horn antenna and Vivaldi antenna is proposed. The horizontal polarization (HP) is achieved by using the H-plane SIW horn antenna, while the vertical polarization (VP) is realized by a typical [...] Read more.
In this paper, a dual-polarized antenna based on a substrate-integrated waveguide (SIW) horn antenna and Vivaldi antenna is proposed. The horizontal polarization (HP) is achieved by using the H-plane SIW horn antenna, while the vertical polarization (VP) is realized by a typical Vivaldi antenna etched on the surface of the SIW horn antenna. In front of the horn aperture, a dielectric lens is designed to optimize impedance matching and enhance directivity. Different feeding structures of the two polarizations are used to enhance the isolation between the two ports. The measured results demonstrate a 20.04–25.5 GHz (23.97%) overlapped dual-polarized impedance bandwidth, and the measured maximum gains of the HP and VP are 5.2 dBi and 8.2 dBi, respectively. A good isolation of 35 dB within the operating band is realized. The proposed dual-polarized antenna meets the demand to transmit and receive signals in two polarization directions simultaneously for wireless communication well. Full article
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