A handset power amplifier with high efficiency at a low level using load-modulation technique

IEEE Transactions on Microwave Theory and Techniques

Volumn 53, Issue 8, 2005, Pages 2639-2644

  Nam, Joongjin ^a   Shin, Jin Ho ^b   Kim, Bumman ^a  

^a Pohang University of Science and Technology (POSTECH)   (South Korea)

^b Future Communication Integrated Circuit Inc   (South Korea)

Author keywords

4 transmission line; Advanced mobile phone system (AMPS); Cellular; Code division multiple access (CDMA); Doherty amplifiers; Handset; InGaP GaAs HBT; Load modulation; Power amplifiers (Pas)

Indexed keywords

CODE DIVISION MULTIPLE ACCESS; ELECTRIC LINES; ELECTRIC POTENTIAL; MONOLITHIC MICROWAVE INTEGRATED CIRCUITS; TELEPHONE SETS; THEOREM PROVING;

Λ/4 TRANSMISSION LINES; ADVANCED MOBILE PHONE SYSTEMS (AMPS); CELLULARS; DOHERTY AMPLIFIERS; INGAP/GAAS HBT; LOAD MODULATION;

POWER AMPLIFIERS;

EID: 24344478203     PISSN: 00189480     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMTT.2005.852745     Document Type: Article

References (12)

1. S. C. Cripps, RF Power Amplifier for Wireless Communications. Norwood, MA: Artech House, 1999.
2. W. H. Doherty, "A new high efficiency power amplifier for modulated waves," in Proc. IRE, vol. 24, Sep. 1936, pp. 1163-1182.
3. J. Nam, Y. Kim, J. Shin, and B. Kim, "A CDMA and AMPS handset power amplifier based on load modulation technique," in Proc. 34th Eur. Microwave Conf. Dig., Amsterdam, The Netherlands, Oct. 2004, pp. 523-526.
4. Y. Yang, J. Yi, Y. Y. Woo, and B. Kim, "Optimum design for linearity and efficiency of microwave Doherty amplifier using a new load matching technique," Microwave J., vol. 44, no. 12, pp. 20-36, Dec. 2001.
5. P. Vizimuller, RF Design Guide Systems, Circuits, and Equations. Norwood, MA: Artech House. 1995.
6. J. Cha, Y. Yang, B. Shin, and B. Kim, "An adaptive bias controlled power amplifier with a load-modulated combining scheme for high efficiency and linearity," in IEEE MTT-S Int. Microwave Symp. Dig., vol. 1, Jun. 2003, pp. 81-84.
7. S. C. Cripps, Advanced Techniques in RF Power Amplifier Design. Norwood, MA: Artech House, 2002.
8. Y. Yang, J. Cha, B. Shin, and B. Kim, "A fully matched n-way Doherty amplifier with optimized linearity," IEEE Trans. Microw. Theory Tech., vol. 51, no. 3, pp. 986-993, Mar. 2003.
9. T. Fowler, K. Burger. N. Cheng, A. Samelis, E. Enobakhare, and S. Rohlfing, "Efficiency improvement techniques at low power levels for linear CDMA and WCDMA power amplifiers," in IEEE Radio Frequency Integrated Circuits Symp. Dig., Jun. 2002, pp. 41-44.
10. P. B. Kenington, High-Linearity RF Amplifier Design. Norwood. MA: Artech House, 2000.
11. M. Iwamoto, A. Williams, P. Chen, A. Metzgerm, C. Wang, L. E. Larson, and P. M. Asbeck. "An extended Doherty amplifier with high efficiency over a wide power range," in IEEE MTT-S Int. Microwave Symp. Dig., vol. 2, May 2001, pp. 931-934.
12. Y.-J. Jeon et al., "A highly efficient CDMA power amplifier based on parallel amplification architecture," IEEE Microw. Wireless Common. Lett., vol. 14. no. 9, pp. 401-403, Sep. 2004.