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Electromagnetic Waves: Applications and Challenges

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: 31 October 2025 | Viewed by 155

Special Issue Editor


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Guest Editor
Department of Communication and Computer Engineering, South-West University “Neofit Rilski”, 2700 Blagoevgrad, Bulgaria
Interests: antenna design and optimization; wireless communication; biological effect of electromagnetic fields; RF energy harvesting; computational electrodynamics
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Special Issue Information

Dear Colleagues,

This Special Issue, “Electromagnetic Waves: Applications and Challenges”, focuses on the diverse applications and current challenges associated with electromagnetic waves and their application in various fields of science and technology. It aims to bring together the latest advances in theoretical research, experimental techniques, and practical implementations involving electromagnetic wave generation, propagation, and interaction with matter. It will explore topics such as novel antenna designs, wave propagation in complex media, microwave imaging, innovative sensor applications, the role of electromagnetic waves in next-generation wireless networks, remote sensing, biomedical engineering, and energy harvesting. Areas of interest include, but are not limited to, the following:

  • Electromagnetic wave propagation;
  • Antenna design and optimization;
  • Wireless communication;
  • Microwave imaging;
  • Metamaterials and metasurfaces;
  • Biomedical applications of electromagnetic waves;
  • Biological effect of electromagnetic fields;
  • Radar and remote sensing;
  • Energy harvesting and wireless power transmission;
  • Computational electrodynamics.

Prof. Dr. Gabriela Atanasova
Guest Editor

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Keywords

  • electromagnetic waves
  • antenna
  • wireless communication
  • microwave imaging
  • metamaterials
  • metasurfaces
  • biomedical applications
  • biological effect
  • energy harvesting
  • wireless power transmission
  • computational electrodynamics

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Published Papers (1 paper)

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Research

15 pages, 3792 KiB  
Article
Polarization Characteristics of a Metasurface with a Single via and a Single Lumped Resistor for Harvesting RF Energy
by Erik Madyo Putro, Satoshi Yagitani, Tomohiko Imachi and Mitsunori Ozaki
Appl. Sci. 2025, 15(15), 8561; https://doi.org/10.3390/app15158561 (registering DOI) - 1 Aug 2025
Abstract
A square patch metasurface is designed, simulated, fabricated, and experimentally tested to investigate polarization characteristics quantitatively. The metasurface consists of one layer unit cell in the form of a square patch with one via and a lumped resistor, which is used for harvesting [...] Read more.
A square patch metasurface is designed, simulated, fabricated, and experimentally tested to investigate polarization characteristics quantitatively. The metasurface consists of one layer unit cell in the form of a square patch with one via and a lumped resistor, which is used for harvesting RF (radio frequency) energy. FR4 dielectric is used as a substrate supported by a metal ground plane. Polarization-dependent properties with specific surface current patterns and voltage dip are obtained when simulating under normal incidence of a plane wave. This characteristic results from changes in surface current conditions when the polarization angle is varied. A voltage dip appears at a specific polarization angle when the surface current pattern is symmetrical. This condition occurs when the position of the lumped resistor from the center of the patch is perpendicular to the linearly polarized incident electric field. A couple of 10 × 10 arrays with different resistor positions are fabricated and tested. The experimental results are in good agreement with the simulated results. The proposed design demonstrates a symmetric unit cell structure with one via and a resistor that exhibits polarization-dependent behavior for linear polarization. An asymmetric patch design is explored through both simulation and measurement to mitigate polarization dependence by suppressing the dip behavior, albeit at the expense of reduced absorption efficiency. This study provides a complete polarization analysis for both symmetric and asymmetric patch metasurfaces with a single via and a single lumped resistor, and introduces a predictive relation between the position of the resistor relative to the center of the patch and the resulting voltage dip behavior. Full article
(This article belongs to the Special Issue Electromagnetic Waves: Applications and Challenges)
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