Title :
Sensitivity of distortion cancellation in feedforward amplifiers to loop imbalances
Author :
Hau, Y.K.G. ; Postoyalko, V. ; Richardson, J.R.
Author_Institution :
Dept. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
The sensitivity of distortion cancellation in feedforward amplifiers to amplitude and phase imbalance is investigated. Some workers have suggested that the amplifier is more sensitive to imbalance in signal cancellation loop. It is shown here that this is not true in general. It can become more sensitive to imbalance in either cancellation loop depending on their level of cancellation. Results of a feedforward amplifier simulation are presented to confirm this finding.
Keywords :
UHF amplifiers; circuit CAD; circuit analysis computing; electric distortion; feedforward; UHF amplifiers; amplifier simulation; amplitude imbalance; distortion cancellation; feedforward amplifiers; phase imbalance; signal cancellation loop; Broadband amplifiers; Couplings; Delay lines; Equalizers; Microwave amplifiers; Microwave technology; Nonlinear distortion; Phase distortion; Propagation losses; Submillimeter wave technology;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.596754
