Nonideality Sources and Implementation Considerations in Polar Transmitters
Paper i proceeding, 2008

In this paper, the main nonidealities appearing in polar transmitters will be addressed, together with several implementation considerarions. Special attention will be paid to the role of AM modulation nonlinearity and parasitic AM-to-PM conversion, once architecture mechanisms 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.

wireless systems.

power amplifiers

Efficiency

nonlinear distortion

linearity

polar transmitters

Författare

J.A. Garcia

J.C. Pedro

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Hossein Mashad Nemati

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

A. Zhu

P Colantonio

Proc. European Microwave Association (EuMA), 2008

Ämneskategorier

Elektroteknik och elektronik