Title :
A CMOS RF Polar Transmitter of a UHF Mobile RFID Reader for High Power Efficiency
Author :
Shim, Sunbo ; Han, Jeonghu ; Hong, Songcheol
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon
Abstract :
A CMOS radio frequency (RF) polar transmitter architecture for a UHF (860-960 MHz) RF identification (RFID) reader is proposed, which consists of a switch-mode CMOS power amplifier (PA) and an analog pulse-shaping filter implemented in 0.25-mum CMOS process. The amplitude modulation of a amplitude shift keying signal is performed by simply switching the common gate transistor of a cascode power amplifier. Extremely low power consumption is achieved when the PA is switched off. The power efficiency of the transmitter is enhanced not only by using switching power amplifier but also by employing this architecture.
Keywords :
CMOS integrated circuits; amplitude shift keying; microwave power amplifiers; radiofrequency identification; switched mode power supplies; CMOS RF polar transmitter; RF identification; UHF mobile RFID reader; amplitude shift keying signal; analog pulse-shaping filter; cascode power amplifier; high power efficiency; switch-mode CMOS power amplifier; Amplitude modulation; Amplitude shift keying; CMOS process; Filters; Power amplifiers; Pulse amplifiers; Radio frequency; Radio transmitters; Radiofrequency amplifiers; Radiofrequency identification; Amplitude shift keying (ASK); CMOS power amplifier; polar transmitter; radio-frequency identification (RFID) reader;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.2002490
