Envelope tracking power amplifier with static predistortion linearization

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. M...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2009-03, Vol.37 (2), p.365-375
Main Authors: Rautio, Timo, Harju, Henri, Hietakangas, Simo, Rahkonen, Timo
Format: Article
Language:English
Subjects:
LDMOS
linearity
power amplifier
predistortion
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Summary: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.
ISSN:0098-9886
1097-007X
DOI:10.1002/cta.549