Title :
Multiport Sensor RFIDs for Wireless Passive Sensing of Objects—Basic Theory and Early Results
Author :
Marrocco, Gaetano ; Mattioni, Lorenzo ; Cala, Claudio
Author_Institution :
Dipt. di Inf., Sist. e Produzione, Univ. of Rome Tor Vergata, Rome
Abstract :
A new family of passive sensor radio-frequency identification devices is here proposed for applications in the context of wireless sensor networks. The new tags, working in the ultra-high frequency band, are able to detect the value or the change of some features of the tagged body without using any specific sensor. Such tags are provided with multiple chips embedded either within a cluster of cooperating antennas or in a single multiport antenna, and exploit the natural mismatch of the antenna input impedance caused by the change of the tagged object. A basic theory of multiport sensor tags is formulated with the purpose to describe the possible classification and detection performances in a unitary context. Some numerical examples and a first experiment corroborate the feasibility of the idea.
Keywords :
antennas; radiofrequency identification; wireless sensor networks; RFID; cooperating antennas; multiport sensor; single multiport antenna; wireless passive sensor; wireless sensor networks; Batteries; Passive RFID tags; Radio frequency; Radiofrequency identification; Sensor phenomena and characterization; Surface acoustic wave devices; Surface acoustic waves; Switches; Switching circuits; Wireless sensor networks; Backscattering; meander line; multiport antenna; radio-frequency identification (RFID); sensor network;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.927541
