TY - GEN
T1 - Doherty amplifier design for 3.5 GHz WiMAX considering load line and loop stability
AU - Medina, M. A.Yarleque
AU - Schreurs, D.
AU - Angelov, I.
AU - Nauwelaers, B.
PY - 2008
Y1 - 2008
N2 - Legacy Doherty amplifier is characterized by using a larger transistor for the peak amplifier such that this reaches saturation with a smaller excitation signal. However due to device availability and modelling considerations, this is not often feasible. In this paper, the design and measurement of a Doherty amplifier utilizing only single sized device is realized. Unlike previous research works, intrinsic load line is utilized to tune the offset lines, as well as to verify the actual dynamic load principle. Stability aspects are covered for this type of amplifier, which are not normally included in earlier works. Finally an assessment of its applicability and benefits for WiMAX at 3.5 GHz is realized using a class AB amplifier as a comparison basis.
AB - Legacy Doherty amplifier is characterized by using a larger transistor for the peak amplifier such that this reaches saturation with a smaller excitation signal. However due to device availability and modelling considerations, this is not often feasible. In this paper, the design and measurement of a Doherty amplifier utilizing only single sized device is realized. Unlike previous research works, intrinsic load line is utilized to tune the offset lines, as well as to verify the actual dynamic load principle. Stability aspects are covered for this type of amplifier, which are not normally included in earlier works. Finally an assessment of its applicability and benefits for WiMAX at 3.5 GHz is realized using a class AB amplifier as a comparison basis.
UR - http://www.scopus.com/inward/record.url?scp=62349126818&partnerID=8YFLogxK
U2 - 10.1109/EUMC.2008.4751764
DO - 10.1109/EUMC.2008.4751764
M3 - Conference contribution
AN - SCOPUS:62349126818
SN - 9782874870064
T3 - Proceedings of the 38th European Microwave Conference, EuMC 2008
SP - 1549
EP - 1552
BT - Proceedings of the 38th European Microwave Conference, EuMC 2008
T2 - 38th European Microwave Conference, EuMC 2008
Y2 - 27 October 2008 through 31 October 2008
ER -