Title :
MMIC-based class-A/F power amplifier for ultra-linear-commercial PCS multiple-modulation-format base station power amplification
Author :
Helms, David ; Testa, Martina ; Vladimirsky, Nelly ; Wills, David
Author_Institution :
Celwave, Corvallis, OR, USA
Abstract :
An MMIC based, three stage, class-A/F driver amplifier provided greatly improved linear power in concurrent multiple modulation formats over previous MMICs and class A/F amplifiers. The modified class A/F structure suppresses the 3rd and 5th order products by more than 15.8 dB and 13 dB respectively, over a typical class A/F amplifier, and by 17.8 dB over a straight class A amplifier. This provides a 3rd order intercept of 56.7 dBm. for only 48 watts DC. The amp has 0.3 dB gain flatness over a 10% AMPs bandwidth. The technique is patented
Keywords :
MESFET integrated circuits; MMIC power amplifiers; modulation; personal communication networks; 3rd order intercept; 3rd order products suppression; 48 W; 5th order products suppression; GaAs; MMIC; PCS; bandwidth; class-A/F driver amplifier; class-A/F power amplifier; gain flatness; linear power; multiple-modulation-format base station; power amplification; Bandwidth; Base stations; FETs; Gallium arsenide; Harmonic analysis; MMICs; Multiaccess communication; Personal communication networks; Power amplifiers; Power generation;
Conference_Titel :
Radio and Wireless Conference, 1998. RAWCON 98. 1998 IEEE
Conference_Location :
Colorado Springs, CO
Print_ISBN :
0-7803-4988-1
DOI :
10.1109/RAWCON.1998.709203
