Realizing Efficient Wireless Power Transfer in the Near-Field Region Using Electrically Small Antennas

Yoon, Ick-Jae; Líu, Hao

doi:10.5772/28897

Cited by 9 publications

(3 citation statements)

References 47 publications

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“…Subsequently, effort have been made to design even smaller folded helix antennas as a means of increasing the figure of merit of PTE/ ka [5]. However, it was observed that the copper wires are physically overlapped each other as ka becomes smaller as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Electrically small folded spherical helix antennas using copper strips and 3D printing technology

et al. 2016

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Folded spherical helix (FSH) antennas using thin and wide copper strips instead of thick wires as a means of reducing the electrical size of ka is designed. It is found that FSH antennas made of copper strips show comparable radiation properties to FSH antennas made of thick wires. Furthermore, such designs can achieve even smaller size down to ka of 0.11 while keeping the radiation quality factors approaching the lower physical bound. An FSH antenna made of copper strips with ka of 0.21 is fabricated as a prototype using 3D printing technology. The measured resonance occurs at 307 MHz with the radiation efficiency of about 90%, verifying the simulated results and the proposed method of utilising copper strips in designing extremely small yet highly efficient volumetric folded helix antennas.

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Section: Introductionmentioning

confidence: 99%

Electrically small folded spherical helix antennas using copper strips and 3D printing technology

et al. 2016

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“…The limitation of using this method was the range of the transmitter and receiver can only perform in a very short distance. Yoon and Ling (2012), the design electrically small, Folded Cylindrical Helix (FCH) antennas had been implement and discuss. The resonant frequency for the antenna to operate was 200 MHz.…”

Section: Introductionmentioning

confidence: 99%

Wireless Energy Transfer Using Microstrip Antenna

Meng

Swee²,

Yun

et al. 2014

American Journal of Applied Sciences

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This study presents a concept on wireless energy transmission using microstrip antenna pairs. Microstrip antenna is chosen in its implementation in wireless energy transfer application primarily due to its characteristics: Its ease of analysis, fabrication and their attractive radiation characteristics. The outcome of this research is the fabrication of two microstrip antennas with resonant frequency of 1.94 GHz and 2.5 GHz respectively. The performance and the power gain for each of microstrip antennas which act as the transmitter and receiver respectively were evaluated within certain distance. The limitations of the experiment as well as the possible solutions in increasing system efficiency are being discussed. Experiment shows that the microstrip antenna with a lower resonant frequency performs better in long distance wireless energy transmission.

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“…Unlike in the optical region [19,20], near field interactions between biomolecules on the nanoscale are poorly explored in radiofrequency and microwave regions. A lot of inspiration can be directly taken from the well-developed theory of near field power transfer between macroscopic antennas [21,22] and near field physics in general [23].…”

Section: How Far Can the Biomacromolecular Radiofrequency Field Reach?mentioning

confidence: 99%

Radiofrequency and microwave interactions between biomolecular systems

Kučera

Cifra

2015

J Biol Phys

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The knowledge of mechanisms underlying interactions between biological systems, be they biomacromolecules or living cells, is crucial for understanding physiology, as well as for possible prevention, diagnostics and therapy of pathological states. Apart from known chemical and direct contact electrical signaling pathways, electromagnetic phenomena were proposed by some authors to mediate non-chemical interactions on both intracellular and intercellular levels. Here, we discuss perspectives in the research of nanoscale electromagnetic interactions between biosystems on radiofrequency and microwave wavelengths. Based on our analysis, the main perspectives are in (i) the micro and nanoscale characterization of both passive and active radiofrequency properties of biomacromolecules and cells, (ii) experimental determination of viscous damping of biomacromolecule structural vibrations and (iii) detailed analysis of energetic circumstances of electromagnetic interactions between oscillating polar biomacromolecules. Current cutting-edge nanotechnology and computational techniques start to enable such studies so we can expect new interesting insights into electromagnetic aspects of molecular biophysics of cell signaling.

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Realizing Efficient Wireless Power Transfer in the Near-Field Region Using Electrically Small Antennas

Cited by 9 publications

References 47 publications

Electrically small folded spherical helix antennas using copper strips and 3D printing technology

Electrically small folded spherical helix antennas using copper strips and 3D printing technology

Wireless Energy Transfer Using Microstrip Antenna

Radiofrequency and microwave interactions between biomolecular systems

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