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http://dx.doi.org/10.5370/KIEE.2012.61.3.437

Design of the 10MHz and 10W Power Source for Short Distance Wireless Power Transmission  

Park, Dong-Hoon (서울시립대 전자전기컴퓨터공학부)
Kim, Gui-Sung ((주)엠가드)
Lim, Eun-Cheon (서울시립대 전자전기컴퓨터공학부)
Park, Hye-Mi (서울시립대 전자전기컴퓨터공학부)
Lee, Moon-Que (서울시립대학교 전자전기컴퓨터공학부)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.61, no.3, 2012 , pp. 437-441 More about this Journal
Abstract
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.
Keywords
WPT(Wireless Power Transmission); Balanced Amplifier; PA(Power Amplifier);
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