Rf Power Amplifier Design Thesis
15-08-2011Nam.Wideband High Power Doherty Amplifiers.
Whether the application is macro cell or small cell base stations, RF power transistors play a critical role in determining the ultimate performance of the transmission path. Even incremental increases in RF linearity, efficiency, and gain can deliver major benefits in cost. Also, with nearly four dozen wireless bands in use globally, spanning as many bands as possible with the fewest devices has become more important than ever. Freescale has introduced three LDMOS transistors and two multi-stage integrated circuits in its Airfast family that are designed to meet these challenges, including two LDMOS power amplifiers that exceed the 50% benchmark for drain efficiency in a Doherty configuration (Figure 1).
Doherty power amplifier Balun master thesis.
Prathamesh Pednekar received his B.E. degree in Electronics and Telecommunication Engineering at The University of Mumbai in 2012. Prior to joining UT Dallas in 2014, he worked as a Research Scientist at Society for Applied Microwave Electronic Engineering and Research, Mumbai. His research interests are Switch mode Power Amplifiers, Power Combining and Outphasing techniques, Passive Microwave components and Phased array RADAR architectures. Prathamesh completed his M.S. degree in Electrical Engineering under the Guidance of Dr. Taylor Barton in August 2016, and is now pursuing a PhD at the University of Colorado Boulder.
A High Efficiency and Wideband Doherty Power Amplifier …
The derived analysis was then verified by the design and implementation of multiple wideband GaN Doherty amplifiers with state-of-the-art bandwidths ranging from 28 % to 42 % and output power levels from 20 W to 200 W.
In this thesis, a power amplifier consisting of two stages; ..
Superior performances were obtained with, for example, a minimum 6 dB back-off power-added efficiency (PAE) of 50 %, measured over 28 % bandwidth of an 80 W Doherty amplifier.
A High Efficiency and Wideband Doherty Power Amplifier for 5G.
A modification on the output combining network was also proposed by using impedance inverters with less transformation ratio, which resulted in a further efficiency improvement compared to the conventional Doherty amplifier.