Title :
Power Amplifier Selection for LINC Applications
Author :
Yao, Jingshi ; Long, Stephen I.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA
Abstract :
Linear amplification with nonlinear components (LINC) using a nonisolating combiner has the potential for high efficiency and good linearity. In past work, the interaction between two power amplifiers has been interpreted as a time-varying load presented at the output of amplifiers, and the linearity and efficiency of the LINC system has been evaluated according to how the power amplifiers respond to the time-varying load. In this paper, it is shown that power amplifiers in LINC are more directly affected by their common output current. Time-varying load is just a result of the interaction. A new approach to analyze the behavior of power amplifiers in a LINC system is introduced in which the amplifier output current-voltage relationship can be used to predict how well a particular type of amplifier will perform in this configuration. Complete analysis and comparison between different types of power amplifiers are presented
Keywords :
network analysis; power amplifiers; time-varying systems; LINC; amplifier output current-voltage relationship; common output current; nonisolating combiner; power amplifier; time varying load; Admittance; High power amplifiers; Impedance; Linearity; Performance analysis; Power amplifiers; Power generation; Radiofrequency amplifiers; Time varying systems; Voltage; Linear amplification with nonlinear components (LINC); linearity; nonisolating combiner; power amplifiers;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.876384
