Wireless power and information transfer in closed space utilizing frequency selected surfaces

Tamura, Masaya; Furusu, Daigo; Takano, Ippei

doi:10.1109/mwsym.2017.8058773

Cited by 12 publications

(3 citation statements)

References 8 publications

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“…We propose cavity mode wireless power transfer in a fully closed space utilizing frequency selected surfaces [8,9]. In this case, the shielded space can work as a cavity resonator as shown in Fig.…”

Section: Determination Of Wpt Frequencymentioning

confidence: 99%

Waveguide-mode wireless power transfer in shielded space with aperture plane

Tamura

Watanabe

Takano

2017

IEICE Electron. Express

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This paper introduces a novel method of waveguide-mode wireless power transfer (WPT) in a shielded space with an aperture plane. First, it is shown that the simplified model of the engine compartment behaves as a ridge waveguide. Next, the WPT efficiency at the resonant frequency of the dominant mode in the ridge waveguide is discussed using a monopole probe and a helical probe. The results obtained from these simulations and measurements indicate a possibility that WPT efficiency can be improved by our method. Finally, it is experimentally demonstrated that the line-ofsight and non-line-of-sight wireless sensors can operate using our method.

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Section: Determination Of Wpt Frequencymentioning

confidence: 99%

Waveguide-mode wireless power transfer in shielded space with aperture plane

Tamura

Watanabe

Takano

2017

IEICE Electron. Express

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“…This method requires the installation of a pillar within the structure, which limits the location of sensors and equipment. Herein, we propose a WPT that utilizes the principle of a cavity resonator and the resonant modes generated inside a metallic structure [22]- [24]. In this method, low-frequency electromagnetic waves are confined within a structure made of metal mesh walls.…”

Section: Introductionmentioning

confidence: 99%

System Design of Cavity Resonance-Enabled Wireless Power Transfer Based on Filter Design Theory

Tamura,

Saeki,

Tamura

2024

IEEE Access

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This study aims to realize an efficient system operation using wireless sensor networks (WSNs), which have been increasing in demand in recent years. To achieve this, a cavity resonanceenabled wireless power transfer (CR-WPT) technique has been proposed. The CR-WPT system is a WPT system that utilizes the cavity resonance phenomenon inside the cavity. This study solves the impedance mismatch problem caused by the resonance frequency changes depending on the installation condition of objects in the cavity resonator, which results in a power transmission efficiency(PTE) decrease. We propose the implementation of J-inverters and additional resonators outside and inside the cavity resonator and the configuration of a three-stage band-pass filter(BPF) to achieve broadband matching. The EM analysis results show that adding the J-inverters and additional resonators produces three poles in the reflection characteristics, verifying the proposed system operates as a three-stage BPF. A broadwidth of the powersupply frequency is realized. With a 2 W power input in the 117-122 MHz band, the bandwidth was broadened from approximately 0.6 to 2.0 MHz, which is approximately thrice the bandwidth of the previous system.INDEX TERMS cavity resonators, wireless power transmission, wireless sensor networks, band-pass filters.

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“…Cavity resonance-enabled wireless power transfer (CR-WPT) has attracted attention as one of the WPT methods that can be used to supply power to sensor nodes 13 -21 . CR-WPT utilizes the resonant modes generated in a shielded space 15 . Its advantages include the abilities to simultaneously feed multiple locations with a single transmitter and efficiently feed power over long distances and out of sight.…”

Section: Introductionmentioning

confidence: 99%

Miniaturization Design of Power-Receiving Module for Cavity Resonance-Enabled Wireless Power Transfer

Akai

Saeki

Tamura

2022

Preprint

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Wireless sensor networks (WSNs) are a candidates for data collection in factories. WSNs possess the problem of securing power for each sensor. Cavity resonance-enabled wireless power transfer (CR-WPT) has attracted attention as a solution to the abovementioned problem. This study proposes a design methodology for a miniaturized power-receiving module for the CR-WPT. The optimum matching circuit for the compact power-receiving modules are designed by considering the transmitter, cavity resonator, and receiver as a single system. The power-receiving module for a transmission frequency of 119 MHz is reduced from 280 x 59 x 67 mm3 to 100 x 30 x 30 mm3, which means a 92% reduction in volume. The compact power-receiving module obtains an efficiency similar to that of a previous power-receiving module.

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Wireless power and information transfer in closed space utilizing frequency selected surfaces

Cited by 12 publications

References 8 publications

Waveguide-mode wireless power transfer in shielded space with aperture plane

Waveguide-mode wireless power transfer in shielded space with aperture plane

System Design of Cavity Resonance-Enabled Wireless Power Transfer Based on Filter Design Theory

Miniaturization Design of Power-Receiving Module for Cavity Resonance-Enabled Wireless Power Transfer

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