Title :
Derivation of power amplifier predistortion circuits by frequency to signal amplitude transformation
Author :
Bai, Dafu ; Haigh, David G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London
Abstract :
In this paper, an original approach for predistortion circuit design based on the passive RC network that can realize gain expansion and phase compression is proposed. The method utilizes FET devices as the nonlinear resistor to realize the required predistortion function and is used to linearize a millimeter-wave power amplifier. This method can effectively improve the linearity while affecting other metrics only slightly. A millimeter- wave power amplifier for LMDS application was linearized with this method and comparison shows that IMD3 was improved by about 8.6 dB.
Keywords :
field effect transistors; millimetre wave power amplifiers; network synthesis; nonlinear distortion; passive networks; resistors; FET devices; LMDS application; frequency-to-signal amplitude transformation; gain expansion; local multipoint distribution service; millimeter-wave power amplifier; nonlinear resistor; passive RC network; phase compression; power amplifier; predistortion circuit design; Circuits; Design engineering; FETs; Frequency; High power amplifiers; Insertion loss; Linearity; Millimeter wave technology; Power amplifiers; Predistortion;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529663
