Title :
Variable phase shifter design for analog predistortion power amplifier linearization system
Author :
Mikyung Cho ; Kenney, J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This paper presents a variable phase shifter (VPS) designed and fabricated for an analog predistortion (APD) power amplifier (P A) linearization system. In this system, there are special demands on the VPS, which haven´t been typical concerns in conventional VPS design. In our study, we focused on developing a VPS customized for APD linearization systems. This VPS has been fabricated in IBM 5PAE 0.35-μm SiGe BiCMOS process, and its area is 0.594 x 0.240 mm2. Measured results show that it has 90° of total phase control from 0.7 GHz to 2.7 GHz, and shows a phase control curve with error less than ±1° over a minimum 55.54° tuning range. Also, the maximum frequency of phase control signal that can be modulated on an RF signal is 115 MHz, enabling a correction bandwidth up to 115 MHz in APD linearization systems.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; UHF integrated circuits; UHF power amplifiers; phase shifters; APD PA linearization system; IBM 5PAE BiCMOS process; RF signal; SiGe; VPS design; analog predistortion power amplifier linearization system; frequency 0.7 GHz to 2.7 GHz; frequency 115 MHz; phase control curve; phase control signal; size 0.35 mum; variable phase shifter design; CMOS integrated circuits; OFDM; RF signals; Voltage control; APD; Analog predistortion; CMOS phase shifter; PA; VPS; linearization; power amplifier; variable phase shifter;
Conference_Titel :
Wireless and Microwave Technology Conference (WAMICON), 2013 IEEE 14th Annual
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5536-0
Electronic_ISBN :
978-1-4673-5535-3
DOI :
10.1109/WAMICON.2013.6572739
