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Frequency-Stable Robust Wireless Power Transfer Based on High-Order Pseudo-Hermitian Physics.

Xianglin Hao1, Ke Yin1, Jianlong Zou1

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This study introduces pseudo-Hermitian theory for wireless power transfer (WPT), enabling stable and efficient energy transmission without needing parity-time (PT) symmetry. This advances coupled multicoil systems.

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Area of Science:

  • Physics
  • Electrical Engineering
  • Electromagnetics

Background:

  • Nonradiative wireless power transfer (WPT) has advanced using parity-time (PT) symmetry.
  • Standard PT-symmetric systems face limitations in complex multisource/multiload configurations.

Purpose of the Study:

  • To extend PT-symmetric Hamiltonians to higher-order pseudo-Hermitian Hamiltonians.
  • To propose and analyze a novel pseudo-Hermitian circuit for WPT.
  • To demonstrate robust and stable WPT performance independent of PT symmetry.

Main Methods:

  • Developed a high-order symmetric tridiagonal pseudo-Hermitian Hamiltonian.
  • Designed a three-mode pseudo-Hermitian dual-transmitter-single-receiver circuit.
  • Analyzed circuit performance under varying coupling coefficients.

Main Results:

  • Achieved robust efficiency and stable frequency in WPT without PT symmetry.
  • Demonstrated that active tuning is unnecessary when coupling changes.
  • Validated the effectiveness of pseudo-Hermitian theory in classical circuits.

Conclusions:

  • Pseudo-Hermitian theory offers a new framework for WPT systems, overcoming PT symmetry limitations.
  • The proposed circuit design enables flexible and efficient wireless power transmission.
  • This work expands the application scope of coupled multicoil systems in WPT.