MR-WPT With Reconfigurable Resonator and Ground for Laptop Application

A magnetic resonance wireless power transfer (MR-WPT) system with a reconfigurable planar receiver (Rx) to optimize transfer efficiency (TE) for laptop application has been investigated. The proposed MR-WPT system consists of a general four-coil system: a source coil and a transmitter Tx) coil in a...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2018-03, Vol.28 (3), p.269-271
Main Authors: Lee, Hoon Hee, Kang, Seok Hyon, Jung, Chang Won
Format: Article
Language:English
Subjects:
Ferrites
Frequency measurement
Laptop application
Magnetic resonance
magnetic resonance (MR)
P-i-n diodes
PIN photodiodes
Portable computers
reconfigurable resonators
transfer efficiency (TE)
Wireless communication
wireless power transfer (WPT)
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Summary:A magnetic resonance wireless power transfer (MR-WPT) system with a reconfigurable planar receiver (Rx) to optimize transfer efficiency (TE) for laptop application has been investigated. The proposed MR-WPT system consists of a general four-coil system: a source coil and a transmitter Tx) coil in a Tx part and an Rx coil and a load coil in an Rx part. To enable performance comparison, the Rx coil uses either a rectangular loop resonator or a slit ground resonator (SGR) and both resonators are connected with a p-i-n diode to reconfigure and optimize the MR-WPT system's TE along the transfer distance between the Tx and Rx parts. Mobile devices, including laptops, need a ground plane for practical use; therefore, the Rx coil is replaced by only an SGR, which operates as both a resonator and a ground. This letter, experimentally and theoretically proves that a reconfigurable MR-WPT system with an SGR has sufficient efficiency without the ferrite sheet typically used in practical MR-WPT applications.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2018.2802719