Title :
Linearization of 1.85 GHz amplifier using feedback predistortion loop
Author :
Youngsik Kim ; Youngoo Yang ; Sanghoon Kang ; Bumman Kim
Abstract :
A new feedback circuit topology was proposed for the cancelling loop of linear power amplifier. This circuit could cancel the intermodulation terms the same way as a typical feedforward technique but the tolerance of the cancellation is enhanced. To verify this circuit topology, an amplifier was designed and two tone test was performed at 1.85 GHz. This experiment showed about 20 dB reduction of intermodulation.
Keywords :
UHF power amplifiers; feedback amplifiers; intermodulation distortion; linearisation techniques; 1.85 GHz; circuit topology; feedback predistortion loop; intermodulation cancellation; linear power amplifier; linearization; two tone test; Band pass filters; Circuit testing; Circuit topology; Digital modulation; Feedback loop; Frequency domain analysis; Negative feedback; Negative feedback loops; Predistortion; Quadrature phase shift keying;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.700701
