RFID, a bridge between the physical and cyber worlds

#APS #Brazil #IEEE #Northeast#RFID #Council

More than 70 years after H. Stockman's publication of his landmark paper
“communications by means of reflected waves” and L. Theremin's demonstration of the so called
“THING” which is a full passive wireless microphone, RFID continues to attract increasing interest for
an extensive set of applications. Its implementation for traceability and identification is enjoying
remarkable success in many applications. Today, RFID is a major technology for the implementation
of IoT and for enabling Artificial Intelligence. In practice, RFID tags are used to identify and locate the
components of a physical system. Reading all the tags in a given system allows it to be associated
with a digital model in cyberspace. Thus, RFID bridges the gap between the physical and cyber
worlds. This keynote, organized in 4 sections, will discuss the state of the art of RFID and its
applications for identification, communication and sensing.
 The first section will introduce the Backscatter phenomena in RF technologies, in particular
Radar, Scattering, and more recently in RFIDs. Early work on backscatter is the landmark paper
of H. Stockman will be pointed out. The Radar Cross Section (RCS) parameter will also be
discussed and how it is exploited for RFID systems. Then the history of backscatter and the
theory behind its physics will be reviewed. Several examples of its exploitation for wireless
communication and sensing will be discussed
 In the second section RFID system components will be discussed along with their classification.
The most emblematic component of RFID is the tag that stores the information and responds to
the RFID reader when interrogated. Tags are very compact devices, composed of an Integrated
Circuit (IC) connected to an antenna. They are typically passive devices empowered by the
interrogation signal generated by the RFID Reader. The operation of tags will be discussed along
with design approaches, in particular the antenna design and the modulation of backscatter
signals. A survey of tag categories, their performance, existing applications, evolutions and
challenges will be included in this section of the course.
 The third section is dedicated to chipless technology. How the Information can be encoded in
the tag, without the support of an Integrated Circuit (IC), will be addressed along with different
solutions will be presented in detail and discussed. A survey of potential applications of this
technology and challenges will also be addressed.
 The fourth section is dedicated to sensor device and how sensing capabilities can be generated
in Chipless devices. A brief review for the main features of a sensor and their characterization
will be provided. Different examples of implementation will be described with emphasis on the
exploitation of RF technologies.

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• campi, Paraiba
• Brazil

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