Design of Dual Frequency Mixed Coupling Coils of Wireless Power and Data Transfer to Enhance Lateral and Angular Misalignment Tolerance

Tao Cheng Yu, Wei Hsiang Huang, Chin Lung Yang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A dual-resonant mixed coupling structure is proposed to enable lateral and angular misalignment immunity in wireless power and data transfer systems. By considering the duality property of electrical coupling and magnetic coupling, mixed coupling coils make the efficiency of wireless power transfer nearly insensitive to axial and angular misalignment. A complete, sophisticated equivalent circuit is proposed and demonstrates the features of the dual-resonant characteristic and lateral and angular misalignment tolerance. Compared to traditional printed spiral coil systems, the proposed mixed coupling structure reduces decline rate of S21 by 26.4% and 78.1% at 35-mm axial misalignment and 90° angular misalignment at low resonant frequency, respectively. Moreover, at high resonant frequency, S21 only drops 16.5% with 60-mm lateral misalignment and is almost flat for 90° angular misalignment. Last but not least, data communication is also validated by transmitting a 200-kHz frequency shift keying signal, and the probability errors remain at acceptable level when misalignment occurs.

Original languageEnglish
Article number8637817
Pages (from-to)216-223
Number of pages8
JournalIEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology
Volume3
Issue number3
DOIs
Publication statusPublished - 2019 Sep

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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