Asymmetric strongly coupled printed resonators for wireless charging applications

Hekal, Sherif; Abdel‐Rahman, Adel B.; Allam, Ahmed; Barakat, Adel; Jia, Hongting; Pokharel, Ramesh K.

doi:10.1109/wamicon.2016.7483829

Cited by 7 publications

(7 citation statements)

References 12 publications

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“…The power transfer efficiency is defined as the coupling efficiency between two resonators which is derived in [10]. For comparing the performance of the system, the suggested system's Figure of Merit (FoM) can be computed by using (2) from [12]. The measurement results are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

Atallah¹,

Abdel‐Rahman²,

Hussein³

et al. 2018

RADIOENGINEERING

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In this article, a new wireless power transfer (WPT) design is proposed for improving the efficiency of the system. The suggested system contains two spiral defected ground structure (DGS) resonators coupled back-toback. A band-pass filter is then to be designed for the wireless power to be transferred from the transmitter unit to the receiver unit. The DGS resonators are loaded through chip capacitors for miniaturization. The proposed structures are fabricated and tested. The proposed system has the highest efficiency of 97.7% at a transmission distance of 10 mm which is suitable for biomedical applications. Both simulated and experimental results are in good concurrence.

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Section: Resultsmentioning

confidence: 99%

“…Two SMD capacitors are added to the gab of the spiral DGS for improving the quality factor with miniaturized resonator by increasing the equivalent capacitance without increasing the total size as described in [12].…”

Section: Single Spiral Dgs Band Stop Filtermentioning

confidence: 99%

A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

Atallah¹,

Abdel‐Rahman²,

Hussein³

et al. 2018

RADIOENGINEERING

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“…The realization of the WPT systems requires the utilization of two coupled (see Figure 2) antennas, acting roles of a transmitter and a receiver, both resonating at the same frequency. There has been an upward spike in the use of the DGS-based resonators in the WPT systems as it leads to circuit size reduction [63], [67]. The first report of DGSbased WPT was developed around H-shaped resonators [48].…”

Section: Recent Advancements Of Dgs-based Wptsmentioning

confidence: 99%

“…Recently reported articles tried to address this requirement. For instance, an asymmetric resonator-based WPT system, where R X is smaller than T X , is one solution to reduce the overall system size [67]. Other exciting designs for size miniaturization include the ultra-compact U and double-rectangular DGS shape dual-band WPT systems working at practical industrial, scientific, and medical (ISM) bands [64], [65].…”

Section: Recent Advancements Of Dgs-based Wptsmentioning

confidence: 99%

Recent Advancements in Defected Ground Structure-Based Near-Field Wireless Power Transfer Systems

et al. 2020

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The defected ground structure (DGS) technique enables miniaturization of the resonator which leads to the development of the compact near-field wireless power transfer (WPT) systems. In general, numerous challenges are inherent in the design of the DGS-based WPT systems and, hence, appropriate trade-offs for achieving optimal performance are required. Furthermore, the design advancements have led to the development of the DGS-based multi-band WPT systems to fulfill the needs of simultaneous data and power transfer. The innovations in the DGS-based WPT systems have also resulted in the definition of more commonly used figures-of-merit for the benchmarking of various performance metrics. The literature is replete with the design schemes to address one or more associated design challenges and successful WPT system realizations with enhanced performance. With this in mind, this paper touches upon the DGS-based WPTs developments and presents a concise report on the current state-of-the-art and future directions.INDEX TERMS Coupling, defected ground structure (DGS), multi-band, resonator, Q factor, single-band, wireless power transfer (WPT).

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“…The obtained equivalent circuit contains the inductances L P1 which presents as a result of the spiral DGS. As well, the capacitance C P1 represents the inserted lumped capacitor in the slot of the spiral to control the working frequency and to reduce the size of the structure as described in [31]. Fig.…”

Section: Single Spiral Dgs Bsfmentioning

confidence: 99%

Compact coupled resonators for small size dual‐frequency wireless power transfer (DF‐WPT) systems

Atallah

Hussein

Abdel‐Rahman

2020

IET Microwaves, Antennas & Propagation

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This work introduces a novel design for high efficiency and compact size dual‐frequency wireless power transfer (DF‐WPT) systems. The proposed design is composed of two identical transmitting (Tx) and receiving (Rx) substrates. Each substrate has a microstrip feed line, a C‐shaped coupled resonator on the top layer and a spiral coupled defected ground structure on the bottom layer. The system is analysed using J‐inverters for the dual‐frequencies (DFs) operation. The measured results show that the proposed DF‐WPT system with a compact size of 20 × 20 mm2 is able to provide a stable WPT characteristic with total efficiencies of 91.2 and 79.4% at 0.28 and 0.49 GHz, respectively with a transmission distance of 6 mm. The proposed system achieved good agreements between the analytical design procedure, the circuit model, the electromagnetic simulations, and the measurements.

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Asymmetric strongly coupled printed resonators for wireless charging applications

Cited by 7 publications

References 12 publications

A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

Recent Advancements in Defected Ground Structure-Based Near-Field Wireless Power Transfer Systems

Compact coupled resonators for small size dual‐frequency wireless power transfer (DF‐WPT) systems

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