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Ultra-Wideband Radio Frequency Identification Systems describes the essentials of radio frequency identification systems as well as their target markets. The authors provide a study of commercially available RFID systems and characterizes their performance in terms of read range and reliability in the presence of conductive and dielectric materials.

The capabilities and limitations of some commercial RFID systems are reported followed by comprehensive discussions of the advantages and challenges of using ultra-wideband technology for tag/reader communications. The book presents practical aspects of UWB RFID system such as: pulse generation, remote powering, tag and reader antenna design, as well as special applications of UWB RFIDs in a simple and easy-to-understand language.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Basics of Radio Frequency Identification (RFID) Systems

Abstract
With the recent advances in wireless communications, Radio frequency Identification (RFID) technology is becoming more of a reality in terms of their widespread use in various applications. Although RFID provides a general capability for tagging and tracking of objects, and has been in use for decades, no RFID system fits all applications. Therefore, it’s important to start this introductory chapter with an overview of the technology in general terms and continue in the later chapters with more detailed discussions on various techniques that can make RFIDs more adaptable to some specialized applications that face challenges with conventional RFID techniques.
Faranak Nekoogar, Farid Dowla

Chapter 2. Characteristics and Limitations of Conventional RFIDs

Abstract
Although RFID technology has been proven to be sufficiently adequate for some applications, such as toll collection and anti-theft systems, there are numerous other applications that cannot benefit from this technology due to some of the limitations of the conventional RFID technologies. With the widespread interest and usage of RFIDs, the vulnerabilities of current RFID systems are becoming apparent. These limitations are directly related to the environment that the tags and readers ­communicate. This environment consists of both the wireless channel and the physical object that the tags are attached to. Various objects and systems in the wireless channel can cause a range of signal degradation such as attenuation, ­multipath fading, and interference to the RF signal carrying the tag information. Since the reliability of an RFID system is directly dependent on the robustness of the tag-reader RF link, the signaling scheme becomes a fundamental area of study for characterization and further performance improvement of such systems.
Faranak Nekoogar, Farid Dowla

Chapter 3. Improvements in RFID Physical Layer Using Ultra-wideband Signals

Abstract
Even though narrowband RFID systems are currently quite mature and effective in many applications, the limitations posed by narrowband signal characteristics (discussed in Chap. 2) makes them somewhat unreliable for use in certain practical environments [1].
Faranak Nekoogar, Farid Dowla

Chapter 4. Ultra-Wideband Technology for RF Tags: Concepts, Implementations, and Regulations

Abstract
UWB RF tag is an ­important technology for non-LOS identification of objects in harsh EM environments. Currently, there is a significant degree of activity in the UWB RF research community to develop UWB tags with robust operational characteristics, features not available with other conventional RF tags.
Faranak Nekoogar, Farid Dowla

Chapter 5. Antenna Design for Ultra-wideband Passive RFID Systems

Abstract
ntennas are one of the key components of all RF wireless communication and radar systems, including RFIDs, as they are responsible for the transmission and reception of free-space or through-barrier weak electromagnetic (EM) signals. The optimal design of antennas for a wideband EM wavefield continues to be an area of important research, one that is rapidly growing in many different fronts. For ­example, recent interest in the use of meta-materials materials with unusual dielectric properties, for designing the radiation pattern of antennas to reduce the size and cost of wireless components could lead to important antenna breakthroughs for RFID tags.
Faranak Nekoogar, Farid Dowla

Chapter 6. RF Tags for Special Applications

Abstract
In spite of the common notion that RFID is a technology for use primarily in departmental stores and supermarkets, the RFID technology might actually be most useful in a number of many special applications. In some of these applications, minimizing the cost of a tag might not necessarily be the main objective. There are a number of important problems where the performance of the tagging and tracking system, rather than a tag’s unit cost, is the critical factor. Although newer generation UHF and LF tags can sometimes be adapted to achieve an acceptable level of performance, the UWB technology might be a natural solution in many other special applications. In this chapter we discuss applications areas where UWB RF tags have the potential to play an important role.
Faranak Nekoogar, Farid Dowla

Backmatter

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