Open AccessDesign of broadband Class E power amplifier in continuous operation modes
Author(s) -
Gao Zhong,
Liu Chang,
Guo Guiliang,
Chen Hua,
Luo Chao,
Han Jingyu,
Zhang Lijun,
Yan Yuepeng
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.3119
Subject(s) - broadband , amplifier , electronic engineering , electrical engineering , power (physics) , class (philosophy) , rf power amplifier , computer science , power bandwidth , engineering , telecommunications , bandwidth (computing) , physics , quantum mechanics , artificial intelligence
Theoretically, constant output power and high DC‐to‐RF efficiency cannot be simultaneously achieved by a broadband Class E power amplifier (PA) even if the load network could provide the accurate impedance desired at each frequency point. Such a problem is solved with the presented concept of continuous Class E modes. New demands on the load and corresponding load network topology are discussed to provide a theoretical basis. To verify the feasibility, a prototype PA in TSMC 0.18 μm CMOS process is also presented. In the simulation, it exhibits a maximum output power of 18.7 dBm, a power added efficiency of 64–80% and an output power flattening of 0.5 dB in the frequency range from 360 to 610 M (52% of the central frequency). A comparison between it and a broadband parallel Class E PA implemented under the same conditions is also given.