Frequency-agile load-modulated magnetic resonance wireless power transfer system for reliable near-field in-band signalling

• Published in: Electronics letters 2013-11, Vol.49 (24), p.1558-1559
• Main Authors: Kim, N.Y, Yoon, S.-W, Kim, C.-W
• Format: Article
• Language: English
• Subjects: Applied sciences; Capacitors. Resistors. Filters; Communication systems; concurrent power; data transfer; Electrical engineering. Electrical power engineering; envelope inversion; Exact sciences and technology; frequency‐agile load modulation scheme; frequency‐agile load‐modulated magnetic resonance wireless power transfer system; high‐frequency band; inductive power transmission; load modulation signal state; magnetic resonance; near‐field coupling region; Power electronics, energy conversion and sustainability; reliable near‐field in‐band signalling; reliable near‐field magnetic communication; strong magnetic resonance coupling; transmitter side; Various equipment and components
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2013.2724

A frequency-agile load modulation scheme is proposed for reliable near-field magnetic communication with a magnetic resonance wireless power transfer system. A working prototype of the system to realise concurrent power and data transfer in the high-frequency band has been fabricated to verify that demodulation of the load modulation signal state detected on the transmitter side is stable over the distance ranges covering the near-field coupling region. This scheme can be a simple and efficient solution against potential issues such as non-communication and envelope inversion arising from strong magnetic resonance coupling.