A high performance Balanced Power Amplifier and Its Integration into a Front end Module at PCS Band
A novel load insensitive power amplifier (LIPA) with balanced structure is developed for 3G (HSDPA and HSUPA) handset application at PCS band from 1850 1910 MHz. No external regulated voltage and analog voltage supplies are required at high power level and it is compatible with DC to DC converters. Digital or analog control may be applied to further improve its PAE at low and middle power levels. This newly featured PA is integrated into a 4x7 mm2 front end module (FEM) with good performance, especially under load mismatch condition.
2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium