Open AccessAntenna pairing for highly efficient wireless power transmission in the reactive near‐field region based on mutual coupled impedance compensation
Author(s) -
Lin DingBing,
Chou HsiTseng,
Chou JuiHung
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.2019.0466
Subject(s) - antenna (radio) , wireless power transfer , transmission (telecommunications) , maximum power transfer theorem , electrical impedance , reflection (computer programming) , electronic engineering , electrical engineering , coupling (piping) , near and far field , wireless , acoustics , physics , engineering , power (physics) , computer science , telecommunications , optics , mechanical engineering , quantum mechanics , programming language
This study presents the design of an antenna pair for short‐distance wireless power transmission (WPT) in the reactive near‐field (NF) region. Instead of designing each antenna alone to achieve good reflection coefficients, the transmitting (TX) and receiving (RX) antennas as a pair are designed to maximise the transmission coefficients. Thus, the antenna pair can mutually compensate the impedance mismatching caused by the coupling between them to enhance energy transfer efficiency. Based on this concept, the developed RX antenna, a key component of rectennas, has a dual functionality to retain relatively stable reflection coefficients when it is moved far away from the NF TX antenna, for example, to pair with other conventional far‐field WPT TX antennas with larger separation distances. The electromagnetic field and energy transfer characteristics, as well as system experiments, are presented to validate the design.