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A LOAD NETWORK FOR DOHERTY AMPLIFIERS USING AN OPTIMIZED IMPEDANCE TRANSFORMER
- Authors
- Jung, SC[Jung, Sung-Chan]; Lim, KH[Lim, Kyoung-Hoon]; Park, HC[Park, Hyun-Chul]; Negra, R[Negra, Renato]; Kim, MS[Kim, Min-Su]; Ghannouchi, FM[Ghannouchi, Fadhel M.]; Yang, Y[Yang, Youngoo]
- Issue Date
- Oct-2009
- Publisher
- JOHN WILEY & SONS INC
- Keywords
- doherty amplifier; load network; impedance transformer; offset line; IM3 cancellation
- Citation
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.51, no.10, pp.2502 - 2504
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
- Volume
- 51
- Number
- 10
- Start Page
- 2502
- End Page
- 2504
- ISSN
- 0895-2477
- Abstract
- We propose a load network, consisting of an optimized impedance transformer, for a Doherty amplifier. This load network allows the carrier and peaking amplifiers to have different load impedance. This results in better IM3 cancellation. Using a four-carrier down-link WCDMA signal, we achieved 0.95 dB higher output power level and 2.21% higher power-added efficiency compared to a conventional Doherty amplifier at an ACLR level of -30 dBc. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2502-2504, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24657
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Related Researcher
- YANG, YOUNGOO
- Information and Communication Engineering (Electronic and Electrical Engineering)