A 6.78 MHz and 90% Efficiency Resonant Wireless Power Supply Technique With the Dual Voltage/Current Tuning Inductance to Supply 30 cm Short-Distance Base Stations for 5G Communications

This article proposes a dual voltage/current ( V/C ) inductance controller, which has good impedance tracking capability without any high-voltage stress problems. Besides, the proposed dual-mode phase-locked loop (D-PLL) technique can detect the phase difference between voltage and current of the an...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2021-10, Vol.36 (10), p.11774-11784
Main Authors: Chen, Hsuan-Yu, Chung, Kai-Cheng, Huang, Jia-Rui, Chen, Shao-Qi, Chen, Ke-Horng, Lin, Ying-Hsi, Lin, Shian-Ru, Tsai, Tsung-Yen
Format: Article
Language:English
Subjects:
Capacitors
Class-E power amplifier (PA)
dual voltage/current (V/C) inductance controller
Efficiency
Gallium nitride
gallium nitride (GaN)
Inductance
inductance tuning technique
Inductors
phase difference (PD) tracking technique
Phase locked loops
Switches
Tracking
Tuning
Wall thickness
wireless power supply (WPS)
Zero voltage switching
zero voltage switching (ZVS)
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Summary:This article proposes a dual voltage/current ( V/C ) inductance controller, which has good impedance tracking capability without any high-voltage stress problems. Besides, the proposed dual-mode phase-locked loop (D-PLL) technique can detect the phase difference between voltage and current of the antenna by fast tracking PLL and the accuracy-improved PLL for inductive and capacitive loads, thereby improving efficiency. Therefore, the 5G small base station on the receiver side (RX) can receive 27.8 W of power with 50% efficiency when the wall thickness to the transmitter side (TX) is 25.2 cm. In the case where the distance between TX and RX is close to zero, 50 W higher power with 90% efficiency can be achieved. Accordingly, the efficiency of resistive and inductive loads can be increased by 13% and 41%, respectively.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2021.3069279