Curved-retrodirective Beamforming System to Improve Microwave Power Transmission Efficiency in the Fresnel Region

This paper presents a curved-retrodirective beamforming system for improving microwave power transmission efficiency in the Fresnel region. Since microwave power transmission in the far-field region has very low efficiency, studies on the Fresnel region are being actively conducted. In these studies...

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Bibliographic Details
Published inIEEE internet of things journal Vol. 10; no. 17; p. 1
Main Authors Kim, Sol, Jo, Hye-Won, Kim, Jeong-Wook, Oh, Ju-Ik, Yu, Jong-Won, Ahn, ByungKuon
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.09.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antennas
Beamforming
Efficiency
Efficiency improvement
Fresnel region
Internet of Things
Microwave antenna arrays
Microwave antennas
Microwave integrated circuits
Microwave power beaming
Mircowave power transmission
Power transmission
Receivers & amplifiers
Retrodirective
Systems design
Transmission efficiency
Transmitters
Transmitting antennas
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Summary:This paper presents a curved-retrodirective beamforming system for improving microwave power transmission efficiency in the Fresnel region. Since microwave power transmission in the far-field region has very low efficiency, studies on the Fresnel region are being actively conducted. In these studies, a retrodirective beamforming (RDB) technique is popular. The RDB system with a sub-array structure was a realistic structure that reduced system complexity. However, the transmission efficiency is lowered because the beamwidth of the transmitter antenna element is narrow. To solve this problem, this paper proposes a curved-retrodirective beamforming system that can focus the microwave power on the receiver. The proposed system uses the peak gain of the transmitter antenna element by using tilted beams to improve transmission efficiency. The system design method that can maximize the transmission efficiency is also presented depending on the given conditions such as transmission distance, characteristics of the transmitter and receiver antenna. The simulation showed a reduction in power leakage compared to the conventional system. The fabrication and measurement validated the efficiency improvement of the proposed system for IoT devices in the Fresnel region.
ISSN:2327-4662
2327-4662
DOI:10.1109/JIOT.2023.3263519