Power Supply to Multiple Sensors and Leakage Field Analysis Using Cavity Resonance-Enabled Wireless Power Transfer

Akai, Suzuka; Saeki, Hiromasa; Tamura, Masaya

doi:10.1109/ims37962.2022.9865566

Cited by 4 publications

(9 citation statements)

References 10 publications

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“…The plane type efficiency was also improved by using a similar plane type in the power transmitter. The power transmitter is installed parallel to the wall 50 mm away, we adopted a plane type with the same size (110 × 110 mm 2 ), as in the literature 21 .…”

Section: Design Of the Power Transmitter And The Power-receiving Modulementioning

confidence: 99%

“…The power-efficiency relationship of the fabricated power receivers was measured. For comparison, a compact power-receiving module with a matching circuit designed using the previous design method 21 (50 Ω for the power transmitter and 100 Ω for the power-receiving module) was also fabricated and measured. Fig.…”

Section: Verification Of One Power-receiving Module Placementmentioning

confidence: 99%

“…The gable-type cavity (1500 mm width, 1800 mm depth, and 1960 mm height) used in this experiment has a dominant mode of 119 MHz. Our previous studies have shown that this gable-type cavity can be used to supply power to multiple power-receiving modules 21 . However, the optimal power-receiving module shape designed in this case is 280 × 59 × 67 mm 3 , which is very large.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. 21 , the input impedance was designed as 50 Ω and 100 Ω by designing independent matching circuits for the transmitter and the receiving modules, respectively. The smaller the size of the receiver, the higher the impedance, so If the impedance of the power-receiving module is individually designed and set to 100 Ω, the reflection will be large for compact power receivers.…”

Section: Introductionmentioning

confidence: 99%

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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.

show abstract

Section: Design Of the Power Transmitter And The Power-receiving Modulementioning

confidence: 99%

Section: Verification Of One Power-receiving Module Placementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Akai

Saeki

Tamura

2022

Preprint

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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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An Internet of Things Management System for Roadside Parking Space Based on Solar Power Supply and RF Energy Transmission

Shi,

Wang

et al. 2024

IEEE Internet Things J.

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Power Supply to Multiple Sensors and Leakage Field Analysis Using Cavity Resonance-Enabled Wireless Power Transfer

Cited by 4 publications

References 10 publications

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

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

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

An Internet of Things Management System for Roadside Parking Space Based on Solar Power Supply and RF Energy Transmission

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