3.5 GHz WiMAX GaN doherty power amplifier with second harmonic tuning | Zendy

Fang Jie | Zendy; Moreno Jorge | Zendy; Quaglia Roberto | Zendy; Camarchia Vittorio | Zendy; Pirola Marco | Zendy; Guerrieri Simona Donati | Zendy; Ramella Chiara | Zendy; Ghione Giovanni | Zendy

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3.5 GHz WiMAX GaN doherty power amplifier with second harmonic tuning

Author(s) -

Fang Jie,

Moreno Jorge,

Quaglia Roberto,

Camarchia Vittorio,

Pirola Marco,

Guerrieri Simona Donati,

Ramella Chiara,

Ghione Giovanni

Publication year - 2012

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.27132

Subject(s) - amplifier , predistortion , doherty amplifier , wimax , electrical engineering , linear amplifier , rf power amplifier , power added efficiency , high electron mobility transistor , electronic engineering , microwave , engineering , baseband , transistor , materials science , optoelectronics , telecommunications , wireless , voltage , cmos

The article presents the design, realization, and experimental validation of a GaN‐based hybrid Doherty power amplifier for WiMAX base‐stations at 3.5 GHz. The amplifier exploits, for the first time as far as authors' knowledge goes, a second harmonic tuning scheme designed to further improve the efficiency in the Doherty region. The amplifier is based on a packaged GaN HEMT from Cree, and shows a saturated output power exceeding 43.2 dBm (21.5 W), a Doherty high‐efficiency region in excess of 6 dB output back‐off, with a first peak and maximum drain efficiency at saturation of 55 and 61%, respectively. The amplifier, with baseband digital predistortion, is compliant with the standard emission mask in the presence of a 9 dB peak to average power ratio WiMAX input and exhibits a weighted efficiency as high as 40%. The performances of the designed amplifier favorably compare with the state of the art for the same application. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2601–2605, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27132

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