Interrogation zone determination in HF RFID systems with multiplexed antennas

Jankowski-Mihułowicz, Piotr; Węglarski, Mariusz

doi:10.2478/aee-2015-0035

Cited by 11 publications

(8 citation statements)

References 16 publications

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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%

“…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%

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Definition, Characteristics and Determining Parameters of Antennas in Terms of Synthesizing the Interrogation Zone in RFID Systems

Jankowski-Mihułowicz¹,

Węglarski²

2017

Radio Frequency Identification

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The radio frequency identification (RFID) systems are gaining in popularity in automated processes of object identification in various socioeconomic areas. However, despite the existing belief, there is no universal RFID system on the commercial market that could be used in all user applications. All components of a developed solution should be carefully selected or designed according to the specification of objects being recognized and characteristics of their environment. In order to determine parameters of propagation or inductively coupled system, especially when it is dedicated to uncommon applications, a multiaspect analysis has to be taken into consideration. Due to complexity, the problem is reduced to analytical or experimental determination of RFID system operation range and a "trial and error" method is mostly used in the industry practice. In order to cope with the barriers existing in the RFID technology, the authors give the review of latest achievements in this field. They focus on the definition, comprehensive characteristics and determination of the antenna parameters. They also pay attention to the 3D interrogation zone (IZ) that is the main parameter in which multitude technical aspects of the RFID systems are gathered simultaneously, as regards the theoretical synthesis as well as market needs.

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Section: Methods To Increase Geometric Size Of the Interrogation Zonementioning

confidence: 99%

Section: Methods To Increase Geometric Size Of the Interrogation Zonementioning

confidence: 99%

Definition, Characteristics and Determining Parameters of Antennas in Terms of Synthesizing the Interrogation Zone in RFID Systems

Jankowski-Mihułowicz¹,

Węglarski²

2017

Radio Frequency Identification

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“…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%

Identification of instruments and implants with RFID and Data Matrix Codes for the use at the instrument table

Böhler

Danioł

Wehrle

2016

ELECTROTECHNICAL REVIEW

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The number of instruments and implants increases the more complex surgeries get. Furthermore, sometimes the labeling is hard to read what takes more time to find the right piece. This research is about the development of a scanner for the identification of medical instruments and implants in an operating theatre. Identification takes place either with passive Radio Frequency Identification (RFID) transponders or Data Matrix barcodes. The data gets transmitted with a Bluetooth module to a connected which analyses the transmitted data and displays both information and a picture. The control of the scanner hardware takes place with a built-in microcontroller, which also connects the scanner with the Bluetooth module. The barcode scanner is able to read the smallest code size of 127 µm in a distance from 43 to 115 mm. RFID transponders placed on or in metal can be read in a distance up to 44 cm depending on the part structure. Streszczenie. Wraz ze skomplikowaniem operacji chirurgicznych rośnie liczba wykorzystywanych w nich narzędzi i implantów. Szybka i poprawna identyfikacja tych narzędzi na podstawie jedynie etykiety nie zawsze jest możliwa. Artykuł prezentuje prototyp skanera służącego do identyfikacji instrumentarium oraz implantów w warunkach panujących na sali operacyjnej. Identyfikacja jest możliwa zarówno poprzez pasywne identyfikatory Radio Frequency Identification (RFID) jak i kody paskowe w formacie Data Matrix. Skaner działa pod kontrolą wbudowanego mikrokontrolera. Dane na temat zidentyfikowanych narzędzi są przesyłane za pomocą modułu Bluetooth do urządzenia mobilnego, gdzie są prezentowane w formie tekstowej i graficznej użytkownikowi. Odczyt kodów paskowych jest możliwy z odległości od 43 do 115 mm dla najmniejszych kodów o rozmiarze 127 µm. Zasięg odczytu identyfikatorów RFID, wbudowanych lub naklejanych, wynosi do 44 cm w zależności od struktury implantu lub narzędzia. Identyfikacja instrumentów i implantów przy wykorzystaniu detektorów RFID

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“…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%

Two-Stage Design Method for Enhanced Inductive Energy Transmission with Q-Constrained Planar Square Loops

et al. 2016

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Q-factor constraints are usually imposed on conductor loops employed as proximity range High Frequency Radio Frequency Identification (HF-RFID) reader antennas to ensure adequate data bandwidth. However, pairing such low Q-factor loops in inductive energy transmission links restricts the link transmission performance. The contribution of this paper is to assess the improvement that is reached with a two-stage design method, concerning the transmission performance of a planar square loop relative to an initial design, without compromise to a Q-factor constraint. The first stage of the synthesis flow is analytical in approach, and determines the number and spacing of turns by which coupling between similar paired square loops can be enhanced with low deviation from the Q-factor limit presented by an initial design. The second stage applies full-wave electromagnetic simulations to determine more appropriate turn spacing and widths to match the Q-factor constraint, and achieve improved coupling relative to the initial design. Evaluating the design method in a test scenario yielded a more than 5% increase in link transmission efficiency, as well as an improvement in the link fractional bandwidth by more than 3%, without violating the loop Q-factor limit. These transmission performance enhancements are indicative of a potential for modifying proximity HF-RFID reader antennas for efficient inductive energy transfer and data telemetry links.

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Interrogation zone determination in HF RFID systems with multiplexed antennas

Cited by 11 publications

References 16 publications

Definition, Characteristics and Determining Parameters of Antennas in Terms of Synthesizing the Interrogation Zone in RFID Systems

Definition, Characteristics and Determining Parameters of Antennas in Terms of Synthesizing the Interrogation Zone in RFID Systems

Identification of instruments and implants with RFID and Data Matrix Codes for the use at the instrument table

Two-Stage Design Method for Enhanced Inductive Energy Transmission with Q-Constrained Planar Square Loops

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