Open AccessCompact coupled resonators for small size dual‐frequency wireless power transfer (DF‐WPT) systems
Author(s) -
Atallah Hany A.,
Hussein Rasha,
AbdelRahman Adel B.
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5693
Subject(s) - wireless power transfer , resonator , microstrip , spiral (railway) , transmission line , wireless , materials science , physics , maximum power transfer theorem , electronic engineering , acoustics , power (physics) , optoelectronics , electrical engineering , engineering , telecommunications , mechanical engineering , quantum mechanics
This work introduces a novel design for high efficiency and compact size dual‐frequency wireless power transfer (DF‐WPT) systems. The proposed design is composed of two identical transmitting (Tx) and receiving (Rx) substrates. Each substrate has a microstrip feed line, a C‐shaped coupled resonator on the top layer and a spiral coupled defected ground structure on the bottom layer. The system is analysed using J‐inverters for the dual‐frequencies (DFs) operation. The measured results show that the proposed DF‐WPT system with a compact size of 20 × 20 mm 2 is able to provide a stable WPT characteristic with total efficiencies of 91.2 and 79.4% at 0.28 and 0.49 GHz, respectively with a transmission distance of 6 mm. The proposed system achieved good agreements between the analytical design procedure, the circuit model, the electromagnetic simulations, and the measurements.