Title :
A 5.8GHz, 47% efficiency, linear outphase power amplifier with fully integrated power combiner
Author :
Pham, Anh ; Sodini, Charles G.
Author_Institution :
Microsystems Technol. Lab., MIT, Cambridge, MA
Abstract :
This paper presents an outphase power amplifier, consisting of two class-E power amplifiers and a power combiner. Using shielded coplanar striplines, the first low-loss, fully integrated 5.8 GHz Wilkinson combiner is realized with excellent isolation for a robust outphase PA. The outphase power amplifier, fabricated in IBM 7WL SiGe BiCMOS, achieves a peak efficiency of 47% at the maximum output power of 18.5dBm. For an orthogonal frequency division multiplexing input signal of 32 sub-channels of 64-QAM, the adjacent channel power leakage ratio is better than 32dBc
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; microwave power amplifiers; power combiners; quadrature amplitude modulation; strip lines; 5.8 GHz; BiCMOS integrated circuits; SiGe; Wilkinson combiner; class-E power amplifier; integrated power combiner; linear outphase power amplifier; orthogonal frequency division multiplexing; shielded coplanar stripline; Amplitude modulation; High power amplifiers; Isolation technology; Linearity; OFDM modulation; Peak to average power ratio; Power amplifiers; Power combiners; Quadrature amplitude modulation; Signal mapping;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2006 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9572-7
DOI :
10.1109/RFIC.2006.1651115
