2015
DOI: 10.2478/aee-2015-0035
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Interrogation zone determination in HF RFID systems with multiplexed antennas

Abstract: Abstract:The operation of an anti-collision RFID system is characterized by the interrogation zone which should be estimated in any direction of 3D space for a group of electronic transponders. The interrogation zone should be as large as possible. However, the many problems in this area are due to the fact that energy can be transferred to transponders only on a limited distance. The greatest flexibility in developing RFID applications and shaping the interrogation zone can be achieved using the system with a… Show more

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Cited by 11 publications
(8 citation statements)
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“…This parameter also should be appropriate to requirements established for an application of automated identification. With regard to problems of dynamic anti-collision systems, selected issues pertinent to increasing geometric size of the IZ are presented in the publications [83,84].…”
Section: Methods To Increase Geometric Size Of the Interrogation Zonementioning
confidence: 99%
See 1 more Smart Citation
“…This parameter also should be appropriate to requirements established for an application of automated identification. With regard to problems of dynamic anti-collision systems, selected issues pertinent to increasing geometric size of the IZ are presented in the publications [83,84].…”
Section: Methods To Increase Geometric Size Of the Interrogation Zonementioning
confidence: 99%
“…The greatest flexibility in developing RFID implementations and shaping the interrogation zone can be achieved using a system with an antenna multiplexer (MUX). In this context, the problem of the IZ determination in HF RFID application with two orthogonal RWD antennas is presented in the chapter [83]. In the paper, the research results are obtained on the basis of theoretical model as well as investigations in an example system configuration.…”
Section: Methods To Increase Geometric Size Of the Interrogation Zonementioning
confidence: 99%
“…On-metal transponder minimum 10 cm. To enlarge the interrogation zone, it would be possible either to deliver more power to the system or using more antennas with the help of a multiplexer [8]. The difference of the ranges occurs because of the circular polarized antenna and its nearly helical electromagnetic field.…”
Section: In-metal Transpondermentioning
confidence: 99%
“…Since the Q-factor increases with the number of turns, it is recommended, therefore, for the reader antenna to be implemented as a single-turn loop [ 10 , 11 ]. However, this limitation in the number of turns would adversely affect the transmission performance of the reader antenna in an energy transfer application [ 5 ], and the extent of the reader interrogation zone in an HF-RFID interaction[ 12 , 13 ]. Geometric techniques are discussed in [ 13 , 14 ] to enable HF-RFID reader loops achieve longer interrogation distances without violating Q-factor limits.…”
Section: Introductionmentioning
confidence: 99%