Separation-Misalignment Insensitive WPT System Using Two-Plane Printed Inductors

Shimaa Alshhawy, Adel Barakat, Kuniaki Yoshitomi, Ramesh K. Pokharel

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


This letter presents a separation-misalignment insensitive wireless power transfer (WPT) system. This insensitivity is possible by minimizing the variation of mutual inductance. The transmitter (TX) of the proposed WPT system uses a two-plane printed inductor, and the receiver (RX) is a single-plane one. The TX encloses the RX to achieve minimal mutual inductance variations. Hence, the lost mutual inductance due to the misalignment between the RX and one of the TX inductors is compensated by getting close to/moving away from the other TX inductor. Furthermore, admittance inversion and compensation networks are designed to compensate for the remaining variations. Then, we design and fabricate a prototype at 50 MHz. Each TX inductor has an area of 50 text {mm} × 50 mm and an initial separation of 30 mm from the 25 text {mm} × 25 mm RX. The measured efficiency ranges between 72.5% and 80.5% for the separation of ±20 mm from the initial position.

Original languageEnglish
Article number8821558
Pages (from-to)683-686
Number of pages4
JournalIEEE Microwave and Wireless Components Letters
Issue number10
Publication statusPublished - Oct 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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