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Envelope tracking power amplifier with static predistortion linearization
Author(s) -
Rautio Timo,
Harju Henri,
Hietakangas Simo,
Rahkonen Timo
Publication year - 2009
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.549
Subject(s) - predistortion , amplifier , linearization , ldmos , linearity , transmitter , envelope (radar) , electronic engineering , power (physics) , linear amplifier , voltage , electrical engineering , tracking (education) , control theory (sociology) , engineering , computer science , transistor , rf power amplifier , telecommunications , nonlinear system , physics , cmos , control (management) , pedagogy , channel (broadcasting) , artificial intelligence , psychology , quantum mechanics , radar
This paper presents the design method, properties and driving techniques of a linear 0.5 W 1 GHz LDMOS power amplifier used in a supply modulated envelope tracking transmitter with real‐time predistortion. Causes of nonlinearities are identified, and various supply voltage drives are experimented. Measured results show that the power efficiency can be improved while maintaining high linearity. Copyright © 2008 John Wiley & Sons, Ltd.