Title :
A microwave feedforward amplifier with improved phase compensation and wideband distortion cancellation
Author :
Hau, Y.K.G. ; Postoyalko, V. ; Richardson, J.R.
Author_Institution :
Dept. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
A new approach to the design of a wideband feedforward amplifier is investigated. Phase equalisers instead of linear delay lines are employed in the feedforward reference paths to match the nonlinear delay/phase characteristics of both the main and error amplifiers. A harmonic balance simulation indicates that this provides significant improvement in intermodulation cancellation over a wide bandwidth.
Keywords :
delays; equalisers; feedforward; intermodulation distortion; linearisation techniques; microwave power amplifiers; bandwidth; error amplifiers; feedforward reference paths; harmonic balance simulation; intermodulation cancellation; microwave feedforward amplifier; multicarrier communication systems; nonlinear delay/phase characteristics; phase compensation; phase equalisers; power amplifier linearisation; wideband distortion cancellation; Attenuators; Bandwidth; Broadband amplifiers; Couplings; Delay lines; Equalizers; Microwave amplifiers; Nonlinear distortion; Phase distortion; Wideband;
Conference_Titel :
Wireless Applications Digest, 1997., IEEE MTT-S Symposium on Technologies for
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-3318-7
DOI :
10.1109/MTTTWA.1997.595115
