JSTS:Journal of Semiconductor Technology and Science

  • 제3권1호
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  • Pages.47-54
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  • 2003
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  • 1598-1657(pISSN)
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  • 2233-4866(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

On-chip Smart Functions for Efficiency Enhancement of MMIC Power Amplifiers for W-CDMA Handset Applications

  • Youn S. Noh (School of Engineering, Information and Communications University(ICU)) ;
  • Kim, Ji H. (School of Engineering, Information and Communications University(ICU)) ;
  • Kim, Joon H. (School of Engineering, Information and Communications University(ICU)) ;
  • Kim, Song G. (Department of Information and Communications, Joongbu University) ;
  • Park, Chul S. (School of Engineering, Information and Communications University(ICU))
  • 발행 : 2003.03.01
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초록

New efficiency enhancement techniques have been devised and implemented to InGaP/GaAs HBT MMIC power amplifiers for W-CDMA mobile terminals applications. Two different types of bias current control circuits that select the efficient quiescent currents in accordance with the required output power levels are proposed for overall power efficiency improvement. A dual chain power amplifier with single matching network composed of two different parallel-connected power amplifier is also introduced. With these efficiency enhancement techniques, the implemented MMIC power amplifiers presents power added efficiency (PAE) more than 14.8 % and adjacent channel leakage ratio(ACLR) lower than -39 dBc at 20 dBm output power and PAE more than 39.4% and ACLR lower than -33 dBc at 28 dBm output power. The average power usage efficiency of the power amplifier is improved by a factor of more than 1.415 with the bias current control circuits and even up to a factor of 3 with the dual chain power amplifier.

키워드

참고문헌

  1. Y. S. Noh and C. S. Park, 'PCS/W-CDMA Dual Band MMIC Power Amplifier With A Newly Proposed Linearizing Bias Circuit,' IEEE Journal of Solid State Circuits, vol. 2, pp. 1096-1099, Sept. 2002 https://doi.org/10.1109/JSSC.2002.801169
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