Journal ArticleDOI
The history of RFID
TLDR
This RFID system uses the principle of modulated backscatter where it can transfer the data from the tag to the reader and changes the loading on the tag antenna in a coded manner corresponding to the stored data.Abstract:
Radio frequency identification (RFID) is an integral part of our life, which increases productivity and convenience. It is the term coined for short-range radio technology used to communicate mainly digital information between a stationary location and a movable object or between movable objects. This RFID system uses the principle of modulated backscatter where it can transfer the data from the tag to the reader. The tag generally reads its internal memory of stored data and changes the loading on the tag antenna in a coded manner corresponding to the stored data. RFID is a technology, which spans systems engineering, software development, encryption etc., and thus there are many engineers involved in the development and application of RFID and at present the shortage of technical and business people trained in RFID is hampering the growth of the industry.read more
Citations
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Journal ArticleDOI
The art of UHF RFID antenna design: impedance-matching and size-reduction techniques
TL;DR: In this article, a homogeneous survey of relevant methodologies for the design of UHF passive tag antennas is presented, within a common framework, the basic concepts of the most-used design layouts.
Journal ArticleDOI
Theory and measurement of backscattering from RFID tags
Pavel Nikitin,K.V.S. Rao +1 more
TL;DR: In this article, the authors presented a method for measuring signal backscattering from RFID tags, and for calculating a tag's radar cross section (RCS) by using an anechoic chamber with and without the tag.
Journal ArticleDOI
Radio-Frequency Identification (RFID) applications: A brief introduction
TL;DR: This short paper introduces the key concepts behind RFID technology and presents a brief historical perspective and examples of RFID applications to highlight the developing popularity of the technology in many sectors.
Proceedings ArticleDOI
An Overview of Near Field UHF RFID
TL;DR: In this paper, an overview of near field UHF RFID is presented, and the basic theory of near and far field antenna coupling in application to RFID, and some experimental measurements are presented.
Proceedings ArticleDOI
Antennas and Propagation in UHF RFID Systems
Pavel Nikitin,K.V.S. Rao +1 more
TL;DR: This paper considers a "reader-tag-reader" link and concentrate on each part of it: reader antennas, propagation channel, and tags, which includes channel modeling equations and experimental measurements of tag performance in various conditions.
References
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Journal ArticleDOI
Communication by Means of Reflected Power
TL;DR: In this paper, the basic theory for reflected power communication is discussed with reference to conventional radar transmission, and the law of propagation is derived and compared with the propagation law for radar.
Journal ArticleDOI
Theory of loaded scatterers
TL;DR: In this paper, a general formulation for the problem of electromagnetic scattering by an object having N terminal pairs (or ports) to which N loads or an N-port network is connected is given.
Patent
Electronic identification system
TL;DR: In this article, an identification tag derives a harmonic signal from the impinging beam and radiates a beam of energy, at the harmonic frequency, which is pulse modulated in accordance with a preset identification code.
Journal ArticleDOI
Short-range radio-telemetry for electronic identification, using modulated RF backscatter
TL;DR: In this article, an electronic identification system using modulated backscatter from an RF beam-powered tag is described, where a subcarrier is used in the return signal format to allow separation from the background clutter and to allow use of a novel method to avoid RF phase problems.