Title :
A 2.4 GHz CMOS Doherty Power Amplifier
Author :
Liu, Chih-Yun ; Luo, Tang-Nian ; Chen, Yi-Jan Emery ; Heo, Deukhyoun
Author_Institution :
Graduate Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei
Abstract :
This paper presents the first implementation of a 2.4GHz Doherty power amplifier with an integrated adaptive bias circuit in standard 0.18-mum CMOS technology. The transmission lines and power divider are realized on a two-layer 32-mil-thick FR-4 board. The total CMOS die size is 0.9 times 0.6 mm2. Operated on a 3V supply, the saturation output power and PidB are 22.6dBm and 21.4dBm, respectively. The power-added-efficiency (PAE) corresponding to P1dB is 33%. At 6dB back-off from P1dB, the achieved PAE is 21%. The measured power gain is 10.6dB. The proposed integrated adaptive bias circuit can substantially improve the performance of the Doherty power amplifier
Keywords :
CMOS integrated circuits; UHF power amplifiers; power dividers; 0.18 micron; 10.6 dB; 2.4 GHz; 3 V; CMOS; Doherty power amplifier; adaptive bias circuit; power added efficiency; power divider; saturation output power; transmission lines; CMOS technology; Distributed parameter circuits; Gain measurement; Integrated circuit measurements; Integrated circuit technology; Power amplifiers; Power dividers; Power generation; Power measurement; Power transmission lines; CMOS; Doherty power amplifier; PAE; adaptive bias;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249834
