Design of flat spiral rectangular loop gate antenna for HF-RFID systems

Kawdungta, Supakit; Phongcharoenpanich, Chuwong; Torrungrueng, Danai

doi:10.1109/apmc.2008.4958407

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…The costs of such a modification are significant, especially in the case of LR devices. As an alternative, a gate antenna could be used [16,17], but it is still not a chip approach and additionally, only one space configuration of the inductive loop is usually achievable.…”

Section: Interrogation Zone Maximization -Reviewmentioning

confidence: 99%

“…However, it is not possible to identify all transponders at any point in the space Ω ID . The most of all these problems are due to the fact that energy can be transferred from the RWD to transponders only on a limited distance [1,[7][8][9][10][11][12][13][14][15][16][17]. Additionally, many parameters and phenomena describing RFID systems have to be considered in a different way than it is in the classical theory valid for typical radio-communication systems.…”

Section: Introductionmentioning

confidence: 99%

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Interrogation zone determination in HF RFID systems with multiplexed antennas

Jankowski-Mihułowicz¹,

Węglarski²

2015

Archives of Electrical Engineering

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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 an antenna multiplexer. Therefore the problem of the interrogation zone determination in HF RFID systems with two orthogonal RWD antennas is presented in the paper. The perceived issues have been effectively dealt with and the solution has been proposed on the basis of the elaborated model. Conducted studies have been used to develop the software tool JankoRFIDmuxHF in the Mathcad environment. The research results are analysed in an example system configuration. The specialized measuring stand has been used for experimental verification of the identification efficiency. The convergence of the measurements and calculations confirms a practical usefulness of the presented concept of interrogation zone determination in anti-collision systems. It also shows the practical utility of the developed model and software tools.

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Section: Interrogation Zone Maximization -Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interrogation zone determination in HF RFID systems with multiplexed antennas

Jankowski-Mihułowicz¹,

Węglarski²

2015

Archives of Electrical Engineering

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“…The project of the antenna structure of the reader is especially important because it can notably 2 ISRN Communications and Networking affect the performances of the system and its installation in the final destination [3][4][5][6][7][8].…”

Section: Antennas For Hf Rfid Systemsmentioning

confidence: 99%

Project and Realization of a Wide-Range High-Frequency RFID Gate Allowing Omnidirectional Detection of Transponders

Benelli

Parrino

Pozzebon

2012

ISRN Communications and Networking

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We describe the study and development of a 2-meter-wide HF RFID gate providing omnidirectional detection of transponders. Common commercial HF RFID gate structures provide a maximum reading range around 150 cm. Moreover, this value is in most cases guaranteed only for the maximum coupling direction, with lower values for the other 2 orientations. The proposed structure raises the value of the reading range up to 200 cm for every orientation of the transponder, with even better results (220 cm) when the transponder is in the position of maximum coupling. This result has been achieved through numerical simulations, focused on the study of the geometry of the antenna system and on the realization of the matching circuit and then confirmed with the physical implementation of the system.

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