Comparison of bandwidth reduction schemes in dynamic load modulation power amplifier architectures
Paper in proceeding, 2011
This paper compares bandwidth reduction schemes for baseband control signals used in high efficiency power amplifier (PA) architectures, such as envelope tracking and dynamic load modulation (DLM). The baseband control signal used in such architectures usually has 3–4 times wider bandwidth than the modulated radio frequency (RF) signal. Such a wideband signal brings challenges for practical hardware design. In this paper, two bandwidth reduction schemes originally used in envelope tracking are applied on a DLM PA. The performance of both schemes are investigated by simulation. The results show that the bandwidth of the baseband control signal can be effectively reduced from 12.5 MHz to 4 MHz, while at the same time, maintaining a 49% average power-added and acceptable linearity.
Author
Haiying Cao
GigaHertz Centre
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
Christian Fager
GigaHertz Centre
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
Talha Khan
Chalmers, Signals and Systems
Ali Soltani Tehrani
Chalmers, Signals and Systems, Communication, Antennas and Optical Networks
GigaHertz Centre
Thomas Eriksson
GigaHertz Centre
Chalmers, Signals and Systems, Communication, Antennas and Optical Networks
IEEE Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2011
1-4
978-1-4577-0650-9 (ISBN)
Areas of Advance
Information and Communication Technology
Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/INMMIC.2011.5773311
ISBN
978-1-4577-0650-9