TY - GEN
T1 - Experimental characterization of power transistors for linearity optimization
AU - Abib, G. I.
AU - Bergeault, E.
AU - Bensmida, S.
AU - Huyart, B.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - In this paper, different techniques are combined in a unique characterization system dedicated for power transistor linearity improvement. Successive optimizations are performed using source-pull/load-pull techniques at the fundamental and base-band frequencies associated with an instantaneous memoryless base-band predistortion procedure. Measurement results performed at 1.575 GHz on a MESFET power transistor biased in class AB for a QPSK modulated signal, show that fundamental frequency source-pull measurements lead to an ACPR variation equal to 3 dB. Moreover, the influence of baseband impedance on ACPR and EVM is found to be 15 dB and 4.5 points, respectively. Finally, instantaneous memoryless baseband predistortion improves ACPR and EVM values by 5 dB and 1 point, respectively.
AB - In this paper, different techniques are combined in a unique characterization system dedicated for power transistor linearity improvement. Successive optimizations are performed using source-pull/load-pull techniques at the fundamental and base-band frequencies associated with an instantaneous memoryless base-band predistortion procedure. Measurement results performed at 1.575 GHz on a MESFET power transistor biased in class AB for a QPSK modulated signal, show that fundamental frequency source-pull measurements lead to an ACPR variation equal to 3 dB. Moreover, the influence of baseband impedance on ACPR and EVM is found to be 15 dB and 4.5 points, respectively. Finally, instantaneous memoryless baseband predistortion improves ACPR and EVM values by 5 dB and 1 point, respectively.
U2 - 10.1109/EUMC.2008.4751433
DO - 10.1109/EUMC.2008.4751433
M3 - Conference contribution
AN - SCOPUS:62349086199
SN - 9782874870064
T3 - Proceedings of the 38th European Microwave Conference, EuMC 2008
SP - 242
EP - 245
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 -