Browse > Article

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))
Publication Information
JSTS:Journal of Semiconductor Technology and Science / v.3, no.1, 2003 , pp. 47-54 More about this Journal
Abstract
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.
Keywords
Power Amplifier; Efficiency; HBT; MMIC; W-CDMA;
Citations & Related Records
연도 인용수 순위
  • Reference
1 T. Sato, S. Yuyama, A. Nakajima, H. Ono, A. Iwai, E. Hase, C. Kusano, 'Intelligent RF power module using automatic bias control (ABC) system for PCS CDMA applications,' IEEE MTT-S Int. Microvewave Symp. Dig., pp.201-204, June 1998   DOI
2 Joon H. Kim, Ji H. Kim, Youn S. Noh, and Chul S. Park, 'An MMIC smart power amplifier of 21% PAE at 16dBm power level for W-CDMA communication terminals', IEEE GaAs IC Symposium, 2002
3 G. Hanington, P.F. Chen, V. Radisic, T. Itoh, P.M. Asbeck, 'Microwave power amplifier efficiency improvement with a 10 MHz HBT DC-DC converter,' 1998 IEEE MTT-S Int. Microwave Symp. Dig., vol. 2, pp. 589-592, June 1999   DOI
4 T. Fowler, K. Burger, Nai-Shuo Cheng, A. Samelis, E. Enobakhare, S. Rohlfing, 'Efficiency improvement techniques at low power levels for linear CDMA and WCDMA power amplifiers,' IEEE RFIC Symp. Dig, pp. 41-44, June 2002   DOI
5 Joon H. Kim, Ji H. Kim, Youn S. Noh, and Chul S. Park, 'High linear HBT MMIC power amplifier with partial RF coupling to bias circuit for W-CDMA portable application', International Conference on Microwave and Millimeter Wave Technology, 2002
6 Kyounghoon Yang, George I. Haddad, and Jack R. East, 'High-Efficiency Class-A Power Amplifiers with a Dual-Bias-Control Scheme,' in IEEE Tans. Microwave TheoryTech., vol. 47, pp. 1426-1432, Aug. 1999   DOI   ScienceOn
7 T. B. Nishimura, N. Iwata, and G. Hau, 'Wide-band CDMA Highly-Efficient Heterojunction FET over Wide Range Output Power with DC-DC Converter,' in IEEE MTT-S. Int. Microwave Symp. Dig., pp. 1091-1094, 1999   DOI
8 Peter M. Asbeck, Lawrence E, Larson, and Ian G. Galton, 'Synergistic Design of DSP and Power Amplifier for Wireless Communications,' in IEEE Tans. Microwave Theory Tech., vol. 49, pp. 2163-2169, Nov. 2001   DOI   ScienceOn
9 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   DOI   ScienceOn