DocumentCode
2395371
Title
Adaptive LDMOS Power Amplifier with Constant Efficiency
Author
Narendra, Kumar ; Anand, Lokesh ; Joshua, Lee ; Tan, TeikSiew ; Boeck, Georg
Author_Institution
Motorola Technol., R&D, Penang
fYear
2007
fDate
Oct. 29 2007-Nov. 1 2007
Firstpage
861
Lastpage
864
Abstract
Achieving constant high efficiency is important in adaptive power amplifier design. This paper highlights the achievement of constant efficiency across wide power levels for power amplifiers with tuned drain supply while having a fixed load impedance network. Due to the non-linear behavior of the trans-conductance at lower drain voltage, class AB bias scheme is implemented. Constant efficiency of 43% across a wide range of power levels (1.2 to 5.3 Watt) is demonstrated experimentally.
Keywords
power MOSFET; power amplifiers; adaptive LDMOS power amplifier; constant efficiency; fixed load impedance network; nonlinear transconductance; tuned drain supply; FETs; High power amplifiers; Impedance; Microwave amplifiers; Microwave technology; Power amplifiers; Power engineering and energy; Power generation; Radio frequency; Voltage; LDMOS; adaptive power amplifier; efficiency; supply adjustment; trans-conductance;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave and Optoelectronics Conference, 2007. IMOC 2007. SBMO/IEEE MTT-S International
Conference_Location
Brazil
Print_ISBN
978-1-4244-0661-6
Electronic_ISBN
978-1-4244-0661-6
Type
conf
DOI
10.1109/IMOC.2007.4404393
Filename
4404393
Link To Document