A load network for Doherty amplifiers using an optimized impedance transformer | Zendy

Jung SungChan | Zendy; Lim KyoungHoon | Zendy; Park HyunChul | Zendy; Negra Renato | Zendy; Kim MinSu | Zendy; Ghannouchi Fadhel M. | Zendy; Yang Youngoo | Zendy

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A load network for Doherty amplifiers using an optimized impedance transformer

Author(s) -

Jung SungChan,

Lim KyoungHoon,

Park HyunChul,

Negra Renato,

Kim MinSu,

Ghannouchi Fadhel M.,

Yang Youngoo

Publication year - 2009

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.24657

Subject(s) - amplifier , doherty amplifier , transformer , electrical engineering , electrical impedance , electronic engineering , dbc , microwave , engineering , input impedance , telecommunications , rf power amplifier , voltage , cmos

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. © 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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