Title :
2.45 GHz power and data transmission for a low-power autonomous sensors platform
Author :
Gregori, Stefano ; Li, Yunlei ; Li, Huijuan ; Liu, Jin ; Maloberti, Franco
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
This paper describes a power conversion and data recovery system for a microwave powered sensor platform. A patch microwave antenna, a matching filter and a rectifier make the system front-end and implement the RF-to-DC conversion of power carrier. The efficiency of the power conversion is as high as 47% with an input power level 250 ΩW at 2.45 GHz. Then, a 0.18 Ωm CMOS integrated circuit extracts the clock and the digital data. A modified pulse amplitude modulation scheme is used to modulate the data on the 2.45 GHz carrier frequency for combined data and power transmission; this scheme allows very low power consumption of the entire IC to be less than 10 ΩW and making the system suitable for an autonomous wireless connected sensor module.
Keywords :
CMOS digital integrated circuits; VLSI; impedance matching; low-power electronics; microstrip antennas; microwave power transmission; rectification; wireless sensor networks; 2.45 GHz; CMOS integrated; RF-DC conversion; VLSI; data recovery system; data transmission; low-power autonomous sensors platform; matching filter; microwave power transmission; microwave powered sensor platform; modified pulse amplitude modulation scheme; patch microwave antenna; power conversion; rectifier; rectifying antenna; very low power consumption; wireless connected sensor module; Amplitude modulation; Data communication; Matched filters; Microwave antennas; Microwave filters; Microwave sensors; Power conversion; Pulse modulation; Sensor phenomena and characterization; Sensor systems;
Conference_Titel :
Low Power Electronics and Design, 2004. ISLPED '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
1-58113-929-2
DOI :
10.1109/LPE.2004.1349349
