Title :
Broadband Doherty Power Amplifier via Real Frequency Technique
Author :
Sun, Guolin ; Jansen, Rolf H.
Author_Institution :
Dept. of Electromagn. Theor., RWTH Aachen Univ., Aachen, Germany
Abstract :
A comprehensive method of designing a broadband Doherty power amplifier is presented in this paper. The essential limitations of bandwidth extension of a Doherty power amplifier are discussed based on the proposed structure of the Doherty power amplifier, which also takes the output matching networks of both sub-amplifiers into account. The broadband matching is realized by applying the simplified real frequency technique with the desired frequency-dependent optimum impedances. GaN transistors were selected to implement the circuit structure.
Keywords :
power amplifiers; wideband amplifiers; broadband Doherty power amplifier; broadband matching; circuit structure; frequency-dependent optimum impedance; output matching networks; real frequency technique; transistors; Broadband amplifiers; Frequency modulation; Impedance; Inverters; Optimization; Transistors; Broadband; Doherty power amplifier; real frequency technique; systematic design procedure;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2175237
