A High Efficiency Class-E Power Amplifier Over a Wide Power Range Using a Look-Up Table Based Dynamic Biasing Scheme

Jonggyun LIM  Wonshil KANG  Kang-Yoon LEE  Hyunchul KU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E98-C   No.4   pp.377-379
Publication Date: 2015/04/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E98.C.377
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
Keyword: 
class-E,  dynamic biasing,  look-up table,  harmonic filter,  power added efficiency,  

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Summary: 
A class-E power amplifier (PA) with novel dynamic biasing scheme is proposed to enhance power added efficiency (PAE) over a wide power range. A look-up table (LUT) adjusts input power and drain supply voltage simultaneously to keep switch mode condition of a power transistor and to optimize the PAE. Experimental results show that the class-E PA using the proposed scheme with harmonic suppression filter gives the PAE higher than 80% over 8.5 dB range with less than 40 dBc harmonic suppression.