Design of the 10MHz and 10w power source for short distance wireless power transmission

Dong Hoon Park, Gui Sung Kim, Eun Cheon Lim, Hye Mi Park, Moon Que Lee

Research output: Contribution to journalArticlepeer-review


In this paper, we have designed and manufactured 10MHz power source for the application of short distance wireless power transmission. The designed power source consists of a DDS(direct digital synthesizer) signal generator, a buffer driver and a balanced power amplifier. Short range wireless power transmission is usually carried out by near-field inductive coupling between source and load. The distance variation between source and load gives rise to the change of load impedance of power amplifier, which has effect on the operation of power amplifier. To overcome this problem due to load variation of power amplifier, we have adopted the balanced power amplifier using the quadrature hybrid implemented by lumped capacitors and a mutually coupled coil. The experiment results show the above 40dBm output power, frequency range of 9 to 11MHz, and total DC power consumption of 36W.

Original languageEnglish
Pages (from-to)437-441
Number of pages5
JournalTransactions of the Korean Institute of Electrical Engineers
Issue number3
StatePublished - Mar 2012


  • Balanced amplifier
  • PA(Power amplifier)
  • WPT(Wireless power transmission)


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