Stabilization of input impedance for wireless power supply circuit

Takahiro Misawa, Tadakuni Sato, Tetsuya Takura, Fumihiro Sato, Hidetoshi Matsuki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A wireless power supply transmits electrical energy from a power source to a load without the use of a connecting wire. There are a number of wireless power supply techniques including electromagnetic induction, electromagnetic radiation, and electrical conduction. Here, we have investigated methods that use electromagnetic induction. Typically, for electromagnetic induction, we assume that the load resistance will fluctuate during battery charging due to variations in the battery voltage. Therefore, to stabilize the electrical power supply, a steady input impedance of the transmission circuit is preferable such that the influence of load resistance fluctuations is minimized. To this end, we suggest a series-parallel resonant circuit for the transmission circuit that has this characteristic.

Original languageEnglish
Article number07E720
JournalJournal of Applied Physics
Issue number7
Publication statusPublished - 2012 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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