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Electronics
Special Issues
Wireless Power Transfer Systems and Applications
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Wireless Power Transfer Systems and Applications

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 15 February 2026 | Viewed by 1665

Special Issue Editors

Prof. Dr. Mihai Iordache

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Guest Editor
Department of Electrotechnics, University POLITEHNICA of Bucharest, Spl. Independentei No. 313, Sector 6, 060042 Bucharest, Romania
Interests: circuit theory; modeling and simulation electrical circuits; symbolic analysis; S parameters; Smith diagram; impedance matching; modeling, simulation; analysis and design of linear and/or nonlinear electrical circuits; wireless power transfer
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Marilena Stanculescu

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Guest Editor
Department of Electrotechnics, University POLITEHNICA of Bucharest, Spl. Independentei No. 313, Sector 6, 060042 Bucharest, Romania
Interests: electrical circuit analysis; simulation analog circuits magnetic field analysis; nondestructive testing; modeling and simulation; measurement methods; evaluation of ferromagnetic bodies magnetic characteristics; numerical methods
Special Issues, Collections and Topics in MDPI journals
Dr. Dragos Niculae

E-Mail Website
Guest Editor
Department of Electrotechnics, Faculty of Electrical Engineering, National University of Science and Technology Politehnica, 060042 Bucharest, Romania
Interests: electric circuits analysis and design; electromagnetic computation and simulation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Maria-Lavinia Bobaru

E-Mail Website
Guest Editor
Department of Electrotechnics, Faculty of Electrical Engineering, National University of Science and Technology Politehnica, 060042 Bucharest, Romania
Interests: electric circuits; wireless power transfer

Special Issue Information

Dear Colleagues,

The main objective of this Special Issue, titled “Wireless Power Transfer Systems and Applications”, is to focus on the most recent achievements in wireless power transfer systems. For this, one seeks advancement in the simulation/design of modern electric systems for wireless power transfer with applications for e-mobility, consumer electronics, smart grids, biomedical purposes, and others.

Topics of interest include, but are not limited to, the following:

  • Circuit theory in wireless power transfer systems (WPTSs);
  • Parameter extraction for magnetic coupled inductors;
  • Finite element analysis used in WPTS;
  • Analysis, design and optimization of WPTS;
  • Frequency splitting and bifurcation phenomena in WPTS;
  • S-parameters and their use in the analysis of wireless electromagnetic energy transfer systems;
  • Coupled mode theory in WPTS;
  • Numerical methods in electrical engineering;
  • Near electromagnetic field numerical computation;
  • Static and/or dynamic charging.

Prof. Dr. Mihai Iordache
Dr. Marilena Stănculescu
Dr. Dragos Niculae
Prof. Dr. Maria-Lavinia Bobaru
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

  • wireless power transfer systems
  • RF circuit analysis
  • S-parameters
  • optimization
  • design

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

12 pages, 3489 KB  
Article
Low-Voltage Stressed Inductive WPT System with Pull–Push Class EF2 Inverter
by Yuting Wang, Jiayue Kuang, Chang Li, Zhidi Chen, Jie Mei, Peng Chen and Jianghua Lu
Electronics 2025, 14(18), 3693; https://doi.org/10.3390/electronics14183693 - 18 Sep 2025
Viewed by 241
Abstract
A class E inverter has presented wide application prospects in inductive wireless power transfer (WPT) systems due to its significant advantages such as high operation frequency, high power density, and low cost. However, its semiconductor power device is subjected to voltage stress several [...] Read more.
A class E inverter has presented wide application prospects in inductive wireless power transfer (WPT) systems due to its significant advantages such as high operation frequency, high power density, and low cost. However, its semiconductor power device is subjected to voltage stress several times higher than the input DC voltage, which inevitably increases the risk of overvoltage failure and limits the system power level. In this manuscript, an inductive WPT system with the pull–push class EF2 inverter is proposed to significantly decrease the voltage stress and ensure soft switching characteristic. The working principle and time-domain waveforms of the pull–push class EF2 inverter are analyzed. Moreover, the differential equations and mathematical model of the resonant parameters are investigated. Compared with the conventional class E inverter, the output power of the proposed inductive WPT system is doubled under the same input voltage. A 100 W system prototype is designed at the operating frequency of 6.78 MHz (according to the A4WP standard) and its experimental results demonstrate the effectiveness and feasibility of the analysis. Full article
(This article belongs to the Special Issue Wireless Power Transfer Systems and Applications)
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17 pages, 4347 KB  
Article
Automatic Procedure and the Use of the Smith Chart in Impedance Matching in Analog Circuits
by Adrian-Florian Georgescu, Dragoș Niculae, Mihai Iordache, Marilena Stănculescu, Ana-Maria Bumbeneci, Lavinia Bobaru, Georgiana Zainea and Mihai Rotaru
Electronics 2025, 14(14), 2746; https://doi.org/10.3390/electronics14142746 - 8 Jul 2025
Viewed by 725
Abstract
This paper presents a comprehensive methodology for impedance matching in analog circuits, integrating analytical methods with computer-aided design techniques. It focuses on maximizing power transfer through impedance adaptation and emphasizes the practical utility of the Smith chart for identifying optimal matching configurations. This [...] Read more.
This paper presents a comprehensive methodology for impedance matching in analog circuits, integrating analytical methods with computer-aided design techniques. It focuses on maximizing power transfer through impedance adaptation and emphasizes the practical utility of the Smith chart for identifying optimal matching configurations. This study examines various impedance matching topologies—including L, T, and Pi networks—with an emphasis on using reactive components such as capacitors and inductors. A MATLAB-based tool is developed to automate the synthesis of matching networks, providing four equivalent circuit solutions for each scenario. Illustrative examples and simulations confirm the method’s efficiency, flexibility, and applicability to a broad range of radiofrequency (RF), microwave, and wireless power transfer systems. Full article
(This article belongs to the Special Issue Wireless Power Transfer Systems and Applications)
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15 pages, 3135 KB  
Article
Resonance Circuit Design Eliminating RX-Side Series Capacitor in LCC-LCC WPT Systems Using an RX Shield Coil
by Yujun Shin, Jaewon Rhee and Seongho Woo
Electronics 2025, 14(13), 2686; https://doi.org/10.3390/electronics14132686 - 2 Jul 2025
Viewed by 392
Abstract
This paper presents a new resonance circuit design method for LCC-LCC wireless power transfer (WPT) systems that incorporate reactive shielding (SH) coils on the receiver (RX) side to suppress the electromagnetic field (EMF). While reactive SH coils are known to reduce leakage magnetic [...] Read more.
This paper presents a new resonance circuit design method for LCC-LCC wireless power transfer (WPT) systems that incorporate reactive shielding (SH) coils on the receiver (RX) side to suppress the electromagnetic field (EMF). While reactive SH coils are known to reduce leakage magnetic fields, they alter the equivalent inductance of the system, thereby disrupting resonance conditions. To address this, we derive the changes in the equivalent inductance caused by SH coils and propose a method to re-select the series capacitor on both the RX and TX sides. Furthermore, we investigate the adjustment of the required input voltage to maintain output power with the SH coils. The proposed methodology eliminates the need for a series capacitor on the RX side, simplifies the network, and reduces the magnetic leakage field by up to 55.6%, as verified by the simulation and measurement results. This study provides a new pathway toward compact, EMF-conscious and LCC-based WPT systems. Full article
(This article belongs to the Special Issue Wireless Power Transfer Systems and Applications)
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