Title :
An analog predistorter with dual rings for WCDMA repeater amplifier
Author :
Bao, Jing-Fu ; Qi, Jia-Hong ; Huang, Jin-fu
Author_Institution :
Sch. of EE, Univ. of Electron. Sci. & Technol. of China, Beijing
Abstract :
This paper presents the design of a predistorter which can be used to improve the linearity of power amplifier working on WCDMA band. For effectively suppress the spectrum regrowth in the adjacent channels, A dual rings predistorter with which the intermodulation distortion (IMD) can be adjusted independently is designed. With the help of the predistorter, ACLR is improved 10 for the cases of one-carrier WCDMA applications. The predistortion power amplifier with dual rings delivers a Pout of 37.02 dBm with an ACLR of -51 dBc. For two-carrier WCDMA applications, the ACLR also been ameliorated 8.5 dB.
Keywords :
broadband networks; code division multiple access; intermodulation distortion; power amplifiers; radio repeaters; WCDMA repeater amplifier dual rings; analog predistorter; intermodulation distortion; one-carrier WCDMA applications; power amplifier; predistortion power amplifier; Broadband amplifiers; Intermodulation distortion; Linearity; Multiaccess communication; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers; Repeaters; Schottky diodes; 3dB coupler; Adjacent channel leakage power ratio (ACLR); Intermodulation distortion (IMD); Power Amplifier; Predistorter;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2008. ICMMT 2008. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-1879-4
Electronic_ISBN :
978-1-4244-1880-0
DOI :
10.1109/ICMMT.2008.4540320
