Title :
1.6 GHz – 3 GHz, 10W, 60% efficiency class-J PA for cognitive radio applications
Author :
Rezaei, Saeid ; Belostotski, Leonid ; Ghannouchi, Fadhel M.
Author_Institution :
Univ. of Calgary, Calgary, AB, Canada
Abstract :
This paper presents the design of a broadband, 1.6-3 GHz, 10 W class-J power amplifier (PA). Analytical expressions of theoretical current and voltage waveforms as well as the fundamental and second harmonic impedance derivations are provided. Taking into account the extrinsic parasitic elements and the nonlinear drain-source capacitance of the packaged RF power transistor, an external output matching network is designed to provide the proper impedances on the design space to the transistor current source plane. Source-pulling of the transistor led to the design a broadband input matching network. The designed amplifier exhibits greater than 60% efficiency and almost 40 dBm output power over 1.4 GHz frequency bandwidth.
Keywords :
UHF power amplifiers; cognitive radio; power transistors; UHF power amplifiers; bandwidth 1.4 GHz; broadband input matching network; class-J power amplifiers; cognitive radio; design space; external output matching network; extrinsic transistot elements; frequency 1.6 GHz to 3 GHz; nonlinear drain-source capacitance; packaged RF power transistor; power 10 W; second harmonic impedance derivations; transistor current source plane; Broadband; Design space; GaN; Power amplifier; Power transistor; Transistor extrinsic elements; class-J;
Conference_Titel :
Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on
Conference_Location :
Columbus, OH
DOI :
10.1109/MWSCAS.2013.6674790
