Nonideality sources and implementation considerations in polar transmitters
Journal article, 2009

In this paper, the main nonidealities appearing in polar transmitters will be addressed, together with several implementation considerations. Special attention will be paid to the role of AM modulation nonlinearity and parasitic AM-to-PM conversion, once architecture mechanisms such as time-delay mismatch between branches or limited bandwidth in the amplitude path are controlled. The device limiting factors for a highly efficient switched mode operation and a linear amplitude modulation will be identified. Some circuit design and implementation guidelines for the RF modulating stage and the envelope amplifier will be discussed, to finish with system-level analysis considerations under two-tone and real communication signal excitations.

Nonlinear distortion

Polar transmitters


Wireless systems

Power amplifiers



Jose A. Garcia

University of Cantabria

Jose C. Pedro

University of Aveiro

Pedro Miguel Cabral

University of Aveiro

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Hossein Mashad Nemati

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Anding Zhu

University College Dublin

P. Colantonio

University of Rome Tor Vergata

International Journal of Microwave and Wireless Technologies

1759-0787 (ISSN)

Vol. 1 2 109-116

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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