Title :
A power-efficient injection-locked class-E power amplifier for wireless sensor network
Author :
Hyoung-Seok Oh ; Taeksang Song ; Euisik Yoon ; Choong-Ki Kim
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
4/1/2006 12:00:00 AM
Abstract :
We present an injection-locked Class-E power amplifier (Class-E ILPA) suitable for 2.4-GHz wireless sensor network applications where the maximum transmit-power is typically about 10dBm. In such a low transmit-power application, it is a great challenge to achieve a high transmit efficiency because the driving power and dc power consumption in the previous stage are no more negligible compared with the transmitted signal power. The proposed Class-E ILPA, which is fully integrated in 0.18-μm CMOS technology, achieves the power added efficiency of 44.5% while delivering the output power of 11dBm with drain efficiency of 49.3% at 1.2-V supply voltage. The measured locking range reaches 300MHz with the input driving power of -6dBm.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF power amplifiers; injection locked amplifiers; low-power electronics; wireless sensor networks; 0.18 micron; 1.2 V; 2.4 GHz; 300 MHz; CMOS technology; injection-locked class-E power amplifier; wireless sensor network; CMOS technology; Energy consumption; Equivalent circuits; Frequency shift keying; Injection-locked oscillators; Power amplifiers; Preamplifiers; Transceivers; Transmitters; Wireless sensor networks; Class-E power amplifier (PA); injection-locked (IL); power oscillator; wireless sensor network (WSN);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.872141
