Title :
A 5.5-GHz Power Amplifier For Wide Bandwidth Polar Modulator
Author :
Zheng, Renliang ; Sanduleanu, Mihai ; Aditham, R.P. ; de Vreede, Leo C. N. ; Ren, Junyan
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai
Abstract :
An efficiency-enhanced power amplifier (PA) is analysed and designed for wide-bandwidth envelope elimination and restoration (EER) system with application to orthogonal frequency-division multiplexing (OFDM) wireless local area network (WLAN) system. The proposed PA has no bandwidth limitation as that of the DC-DC converter used in classical polar modulator. The simulation result shows that the average power-added efficiency (PAE) is 25.38% at a 5.5Ghz average output power of 19dBm with peak to average ratio about 7.7dB and the overall error vector magnitude (EVM) remains less than 10% throughout its output power range. This PA shows much higher PAE among the reported WLAN BiCMOS HBT PAs as well as satisfying IEEE802.11a transmitter back off requirement
Keywords :
OFDM modulation; microwave power amplifiers; modulators; wireless LAN; 5.5 GHz; DC-DC converter; IEEE802.11a transmitter; OFDM; WLAN BiCMOS HBT PA; WLAN system; efficiency-enhanced power amplifier; envelope elimination and restoration system; error vector magnitude; microwave power amplifier; orthogonal frequency-division multiplexing; power-added efficiency; wide bandwidth polar modulator; wireless local area network system; Bandwidth; Broadband amplifiers; DC-DC power converters; Frequency division multiplexing; OFDM modulation; Peak to average power ratio; Power amplifiers; Power generation; Power system restoration; Wireless LAN;
Conference_Titel :
Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0160-7
Electronic_ISBN :
1-4244-0161-5
DOI :
10.1109/ICSICT.2006.306406
