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

Hsuan Yu Chen, Kai Cheng Chung, Jia Rui Huang, Shao Qi Chen, Ke Horng Chen, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

Research output: Contribution to journalArticlepeer-review

Abstract

this paper 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 27.8W of power with 50% efficiency when the wall thickness to the transmitter side (TX) is 25.2cm. In the case where the distance between TX and RX is close to zero, 50W higher power with 90% efficiency can be achieved. Accordingly, the efficiency of resistive and inductive loads can be increased by 13% and 41%, respectively.

Original languageEnglish
JournalIEEE Transactions on Power Electronics
DOIs
StateAccepted/In press - 2021

Keywords

  • Capacitors
  • class-E power amplifier (PA)
  • dual voltage/current (V/C) inductance controller
  • Gallium nitride
  • Gallium Nitride (GaN)
  • Inductance
  • inductance tuning technique
  • Inductors
  • phase difference (PD) tracking technique
  • Switches
  • Tuning
  • wireless power supply (WPS)
  • Zero voltage switching
  • zero voltage switching (ZVS)

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