DocumentCode :
83058
Title :
A 2.4 GHz Power Amplifier With 40% Global Efficiency at 
5 dBm Output for Autonomous Wireless Sensor Nodes
Author :
Stoopman, Mark ; Philips, Kathleen ; Serdijn, Wouter A.
Author_Institution :
Sect. Bioelectronics, Delft Univ. of Technol., Delft, Netherlands
Volume :
25
Issue :
4
fYear :
2015
fDate :
Apr-15
Firstpage :
256
Lastpage :
258
Abstract :
Energy scavenged Wireless Sensor Nodes (WSNs) usually require a small output power ( 0 dBm) due to their short-range application and limited power budget. This makes the RF Power Amplifier (PA) design differ from conventional PAs as the output power becomes comparable to the PA driver´s power consumption. In this letter, a 2.4 GHz tuned switching PA and driver is proposed with an on-chip duty cycle calibration loop to enhance efficiency. A prototype is fabricated in 40 nm CMOS technology and supports On-Off keying (OOK). Measurements show a global efficiency of 40% when delivering -5 dBm to a 50 Ω load.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF power amplifiers; amplitude shift keying; calibration; wireless sensor networks; CMOS technology; RF power amplifier; autonomous wireless sensor nodes; frequency 2.4 GHz; global efficiency; on-chip duty cycle calibration loop; on-off keying; size 40 nm; CMOS integrated circuits; Calibration; Power amplifiers; Power generation; Transistors; Wireless communication; Wireless sensor networks; Calibration; duty cycle; efficiency; power amplifier (PA); wireless sensor node (WSN);
fLanguage :
English
Journal_Title :
Microwave and Wireless Components Letters, IEEE
Publisher :
ieee
ISSN :
1531-1309
Type :
jour
DOI :
10.1109/LMWC.2015.2400940
Filename :
7051293
Link To Document :
