Title :
High Efficiency RF Power Amplifier Designed With Harmonic Real-Time Active Load-Pull
Author :
Cui, Xian ; Doo, Seok Joo ; Roblin, Patrick ; Strahler, Jeffrey ; Rojas-Teran, Roberto G.
Author_Institution :
Ohio State Univ., Columbus
fDate :
4/1/2008 12:00:00 AM
Abstract :
In this work, a high efficiency p-HEMT radio frequency power amplifier (PA) is designed using a new multiharmonic real-time active load-pull using the large signal network analyzer. This technique synthesizes a large set of instantaneous load mismatches to quickly find the optimal harmonic impedances, so as to achieve high PA efficiency in a shortened design cycle. At 2 GHz a demo power amplifier implemented with a p-HEMT demonstrated a power added efficiency (PAE) of 68.5% for 18.0 dBm output power, while achieving a maximum PAE of 75% below the 1 dB compression point for 18.6 dBm output power.
Keywords :
network analysers; power amplifiers; radiofrequency amplifiers; demo power amplifier; frequency 2 GHz; gain 1 dB; gain 18.6 dB; high efficiency RF power amplifier; instantaneous load mismatches; large signal network analyzer; multiharmonic realtime active load-pull; optimal harmonic impedances; p-HEMT radio frequency power amplifier; power added efficiency; shortened design cycle; Large signal network analyzer (LSNA); power added efficiency (PAE); power amplifier (PA); real-time active load-pull (RT-ALP);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.918913
