Title :
Active UWB Reflector for RFID and Wireless Sensor Networks
Author :
Lazaro, Antonio ; Ramos, Angel ; Villarino, R. ; Girbau, David
Author_Institution :
Electron., Electr. & Automatics Eng. Dept., Univ. Rovira i Virgili, Tarragona, Spain
Abstract :
In this paper, we present an active ultra-wideband (UWB) reflector for radio frequency identification (RFID) and wireless sensor applications. The tag is composed of a receiver UWB antenna connected to a broadband amplifier. Its output is connected to a cross-polarized transmit antenna. In order to increase the battery lifetime, an UHF link is used to wake up the microcontroller. It modulates the radar cross section of the tag by turning the amplifier bias on and off. The amplitude of the reflected UWB pulse sent by the UWB reader is modulated as a result. The basic theory of operation of ultra-wideband radio identification systems is explained in this paper. A proof of concept using commercial components and experimental results obtained with an ultra-wideband radar are presented.
Keywords :
microcontrollers; radar antennas; radiofrequency identification; transmitting antennas; ultra wideband antennas; ultra wideband communication; ultra wideband radar; wideband amplifiers; wireless sensor networks; RFID; UHF link; UWB pulse; UWB reader; active UWB reflector; active ultrawideband reflector; battery lifetime; broadband amplifier; cross-polarized transmit antenna; microcontroller; radar cross section; radiofrequency identification; receiver UWB antenna; ultrawideband radar; wireless sensor networks; Active antennas; radio frequency identification (RFID); transponder; ultra-wideband (UWB);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2269473
