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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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A Highly Efficient GaAs HBT MMIC Balanced Power Amplifier for W-CDMA Handset Applications

  • Kim, Un-Ha (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Kim, Jung-Hyun (School of Electrical Engineering and Computer Science, Hanyang University) ;
  • Kwon, Young-Woo (School of Electrical Engineering and Computer Science, Seoul National University)
  • Received : 2009.05.16
  • Accepted : 2009.06.24
  • Published : 2009.10.31
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Abstract

A highly efficient and compactly integrated balanced power amplifier (PA) for W-CDMA handset applications is presented. To overcome the size limit of a typical balanced PA, a bulky input divider is integrated into a PA MMIC, and a complex output network is replaced with simple lumped-element networks. For efficiency improvement at the low output power level, one of the two amplifiers in parallel is deactivated and the other is partially operated with corresponding load impedance optimization. The implemented PA shows excellent average current consumption of 34.5 mA in urban and 56.3 mA in suburban environments, while exhibiting very good load-insensitivity under condition of VSWR=4:1.

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References

  1. T. Fowler et al., “Efficiency Improvement Techniques at Low Power Levels for Linear CDMA and WCDMA Power Amplifiers,” IEEE RFIC Symp. Digest, June 2002, pp. 41-44.
  2. S. Maeng et al., “A Low Distortion and Low Dissipation Power Amplifier with Gate Bias Control Circuit for Digital/Analog Dual-Mode Cellular Phones,” ETRI J., vol. 19, no. 2, July 1997, pp. 35-47. https://doi.org/10.4218/etrij.97.0197.0021
  3. G. Berretta, D. Cristaudo, and S. Scaccianoce, “A Balanced CDMA2000 SiGe HBT Load Insensitive Power Amplifier,” IEEE Radio and Wireless Symp. Digest, Jan. 2006, pp. 523-526.
  4. A. Keerti and A. Pham, “Dynamic Output Phase to Adaptively Improve the Linearity of Power Amplifier under Antenna Mismatch,” IEEE RFIC Symp. Digest, June 2005, pp. 675-678.
  5. G. Zhang, S. Chang, and Z. Alon, “A High Performance Balanced Power Amplifier and Its Integration into a Front-End Module at PCS Band,” IEEE RFIC Symp. Digest, June 2007, pp. 251-254.
  6. J. Kim et al., High Efficiency Power Amplifier with Multiple Power Modes, US Patent 6,900,692, May 2005.
  7. S. Chen, W. Panton, and R. Gilmore, “Effects of Nonlinear Distortion on CDMA Communication Systems,” IEEE Trans. Microw. Theory Tech., vol. 44, no. 12, Dec. 1996, pp. 2743-2750. https://doi.org/10.1109/22.554660

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