A mid-range wireless power transfer system for portable electronic devices using beam forming

A mid-range wireless power transfer system for portable electronic devices using beam forming

This work presents the design, fabrication, and testing of a wireless power transfer system with a range of 3 m operating at 2.4 GHz. The system comprises custom-designed transmitter (TX), and receiver (RX) blocks to establish the power-link and data-link using ESP-32 module to perform a handshaking...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing Vol. 115; no. 2; pp. 195 - 209
Main Authors: Pirzada, Bilal Sanauddin, Shafique, Kinza, Jawed, Syed Arsalan, Muqim, Irfan, Amin, Syed Usman, Abubaker, Faiqa, Khan, Fahd, Shahbaz, Muhammad Aaquib, Jabbar, Muhammad Junaid, Abbas, Mustafa Fazal
Format: Journal Article
Language:English
Published: New York Springer US 01-05-2023
Springer Nature B.V
Subjects:
Antenna arrays
Azimuth
Beam steering
Beamforming
Charge pumps
Circuits and Systems
Data links
Directivity
Electrical Engineering
Electronic devices
Engineering
Fabrication
Patch antennas
Phase shifters
Portable equipment
Power amplifiers
Power dividers
Signal,Image and Speech Processing
Wireless power transmission
Power divider
Beam steering
Digital phase shifter board
Microstrip patch antenna array
Beam forming
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Summary:This work presents the design, fabrication, and testing of a wireless power transfer system with a range of 3 m operating at 2.4 GHz. The system comprises custom-designed transmitter (TX), and receiver (RX) blocks to establish the power-link and data-link using ESP-32 module to perform a handshaking between TX and RX for efficient beam steering. The TX employs a 1-Dimensional (1D) 4-element microstrip patch antenna array for beam steering in azimuth and achieves the elevation coverage using multiple TX's. Each element in the TX antenna array is fed by a dedicated commerical of-the-shelf (COTS) channel consisting of Power Amplifiers, Phase Shifter ICs, a passive power divider, and a single oscillator. The RX patch antenna is followed by an efficient multi-stage charge-pump rectifier which generates buffered 5 V at 2.5Watts for the backend mobile device charging. The RX device activates the data link, enabling the TX to perform a smart segmented beam steering to determine the optimal beam directivity depending on the mobile device location. The system achieves a beam steering of ± 30 degrees in azimuth and a beam width of 10 degrees at 3 m while exhibiting TX and RX antenna gains of 4.4 dBi and 4 dBi, respectively. At a transmitted power of + 30dBm, the received power at 10 inches is − 5dBm, and the charge pump generates 5 V at its fourth stage, demonstrating the feasibility of a safe and efficient wireless power transfer for indoor settings.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-023-02148-w