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

fYear

2004

Firstpage

269

Lastpage

273

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Low Power Electronics and Design, 2004. ISLPED '04. Proceedings of the 2004 International Symposium on

Print_ISBN

1-58113-929-2

Type

conf

DOI

10.1109/LPE.2004.1349349

Filename

1349349