Efficiency enhancement method for high-power amplifiers using a dynamic load adaptation technique

IEEE MTT-S International Microwave Symposium Digest

Volumn 2005, Issue , 2005, Pages 2059-2062

  Jeong, Hyeong Tae ^a   Lee, Hyun Seok ^a   Chang, Ik Soo ^a   Kim, Chul Dong ^b  

^a Sogang University   (South Korea)

^b SEWON Teletech Inc   (South Korea)

Author keywords

Dynamic load adaptation; Efficiency enhancement; Tunable impedance transformer

Indexed keywords

CONTROL SYSTEMS; ELECTRIC IMPEDANCE; ELECTRIC LINES; ELECTRIC LOAD MANAGEMENT; ELECTRIC TRANSFORMERS; LEAKAGE CURRENTS;

ADJACENT CHANNEL LEAKAGE POWER RATIO (ACLR); DYNAMIC LOAD ADAPTATION; TUNABLE IMPEDANCE TRANSFORMERS;

POWER AMPLIFIERS;

EID: 33748361877     PISSN: 0149645X     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.1109/MWSYM.2005.1517151     Document Type: Conference Paper

References (6)

1. Steve C. Cripps," RF Power Amplifier for Wireless Communication," Artech House. Norwood, MA., 2002, pp.200-250
2. K. Siwiak, D. H. Minasi, "Radio frequency power amplifier having variable output power," US patent 5,276,912, Jan. 4, 1994
3. W. P. Alberth, A. Klimsdorf, L. Winkelmann, "Load envelope following amplifier system," US patent 6,349,216 B1
4. Seungwoo Kim, Jongwoo Lee, Jinho Shin and Bumman Kim, "CDMA handset power amplifier with a switched output matching circuit for low/high power mode operation," in MTT-S 2004, pp. 1523-1526, Fort Worth, TX, June 2004
5. Federick H. Raab, "High efficiency linear amplication by dynamic load modulation," in MTT-S 2003, pp. 1717-1720, Philadelphia, Pennsylvania, June 2003
6. A. C. Cotler and E. R. Brown, "The Feasibility of a Variable output Matching Circuit in a High-Power SSPA," Radio and Wireless Conference, 2002. RAWCON 2002. IEEE, 11-14 Aug. 2002 pages: 189-191