Title :
A novel wideband frequency-tunable feedforward power amplifier [RF]
Author :
Gong, Fan ; Zhang, Yuejun ; Yao, Yan
Author_Institution :
State Key Lab On Microwave & Digital Commun., Tsinghua Univ., Beijing, China
fDate :
29 June-1 July 2002
Abstract :
A novel feedforward amplifier with frequency tunable ability was studied for wideband wireless communication applications. This kind of feedforward amplifier is based on the complex gain stability approach proposed before, but what is different is the add-on adaptive function in frequency, thus making it able to work within a wider frequency range, and keeping very good performance at the same time. The amplifier is suitable for narrow bandwidth signals whose central frequency sometimes changes in a wide range, for instance, a repeater system.
Keywords :
adaptive control; circuit stability; circuit tuning; feedforward; intermodulation distortion; linearisation techniques; power amplifiers; radio repeaters; radiofrequency amplifiers; wideband amplifiers; adaptive frequency functions; amplifier linearization; complex gain stability; distortion reduction; intermodulation cancellation; narrow bandwidth signals; repeater systems; wide operating frequency range; wideband frequency-tunable feedforward RF power amplifiers; wideband wireless communication; Bandwidth; Broadband amplifiers; Degradation; Frequency; Nonlinear distortion; Phase distortion; Phase modulation; Power amplifiers; Signal generators; Telecommunications;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1179009
