Open AccessImpedance matching network for ground eliminated open‐ended resonant coil structure in distributed wireless power transmission systems
Author(s) -
Zarifi Telnaz,
Moez Kambiz,
Mousavi Pedram
Publication year - 2017
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2016.0325
Subject(s) - impedance matching , electromagnetic coil , electrical impedance , ground plane , transmission (telecommunications) , transmission line , electronic engineering , matching (statistics) , power transmission , electrical engineering , power (physics) , electric power transmission , wireless , node (physics) , image impedance , computer science , quarter wave impedance transformer , engineering , acoustics , telecommunications , physics , damping factor , statistics , mathematics , quantum mechanics , antenna (radio)
This study reports a novel technique utilising a standing‐wave node as a virtual ground to implement an impedance matching network and power level tuning in a ground eliminated (GE) open‐ended resonant coil structure. This technique with GE open‐ended coils can potentially be used in wireless power transmission (WPT) systems, where an unknown metallic, ungrounded, arbitrary environment is used as a signal propagation medium to deliver electric power to several distributed nodes. To satisfy WPT standards the proposed resonant WPT system with the matching network is implemented and tested at 13.56 MHz. A comprehensive study of the GE open‐ended resonant coil structure demonstrates ground‐plane effects and the necessity of an impedance matching network in no‐ground signal situations. The experimental results confirm the theoretical analysis presenting 9% improvements in mismatch efficiency, and 13.1 times in power transmission efficiency at 13.56 MHz when the matching network is deployed.