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Co‐design of two‐way doherty power amplifier and filter for concurrent dual‐band application
Author(s) -
Dai Zhijiang,
He Songbai,
Peng Jun,
Pang Jingzhou,
Hao Peng,
Huang Chaoyi
Publication year - 2017
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.30330
Subject(s) - intermodulation , multi band device , amplifier , port (circuit theory) , harmonic , electronic engineering , electrical engineering , power (physics) , engineering , microwave , electrical impedance , filter (signal processing) , computer science , telecommunications , physics , acoustics , antenna (radio) , cmos , quantum mechanics
In this letter, an architecture is presented to solve problems of classical concurrent dual‐band Doherty power amplifiers (DPAs) and its design procedure is given. It is a codesign of two single‐band DPAs and four filters. Two of filters at the output port are used for impedance transformation, harmonic components suppressing and signal isolating, while the another two split concurrent dual‐band signals at the input port. In this way, intermodulation components of the two bands can be effectively suppressed and each band can achieve a good performance as single‐band one's. This design concept is demonstrated through implementing of a practical dual‐band DPA operating at 1.8 and 2.5 GHz. Measurement results show that efficiencies are 65.0 and 56.3% at the 6 dB output power back‐off for concurrent application. The intermodulation components and harmonic components are lower than −40 dB except second harmonic component at 1.8 GHz (−32 dB). © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:530–533, 2017