UHF RFID localization system based on a phased array antenna

Kronberger, Rainer; Knie, Thomas; Leonardi, R.; Dettmar, Uwe; Cremer, Markus; Azzouzi, Salah

doi:10.1109/aps.2011.5996761

Cited by 43 publications

(12 citation statements)

References 7 publications

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“…With an ultra-wide 3 dB AR beamwidth of 136 • , 2D beam-scan from 0 • to 360 • in the azimuth plane and 0 • to 40 • in the elevation plane, the proposed antenna could be used in UHF RFID systems to provide better signal coverage. Moreover, as the antenna's radiation pattern is predictable and stable during the beamscanning process, it is suitable to be used in RFID localization schemes where the beam-steering ability is involved [18], [19]. Fig.…”

Section: Discussionmentioning

confidence: 99%

Beam Scanning UHF RFID Reader Antenna With High Gain and Wide Axial Ratio Beamwidth

Chen

Yang

Ndifon

et al. 2020

IEEE J. Radio Freq. Identif.

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A novel ultra-high-frequency (UHF) RFID reader antenna with 2 dimensional (2D) beam-scanning capability and a wide 3 dB axial ratio (AR) beamwidth of over 136 • is presented. The proposed antenna consists of three concentric metal rings, each having a branch wire to stimulate circular polarization (CP) and a separate feed. The antenna is able to perform a 2D beam-scan with a relatively stable gain (9-11 dBic) from 0 • to 360 • in azimuth, and-40 • to 40 • in zenith. The minima of the antenna's AR beamwidth follows the peak gain direction, giving an equivalent 3 dB AR beamwidth of 136 • for every phi cut, wider than current state-of-the-art [1]. Moreover, the proposed antenna array presents a 50Ω impedance with no impedance matching network, and requires only two phase shifters to steer, significantly reducing the design complexity. The antenna's-10 dB return loss bandwidth is from 843 MHz to 880 MHz, covering the lower band UHF RFID frequencies in the European Telecommunications Standards Institute (ETSI) region.

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Section: Discussionmentioning

confidence: 99%

Beam Scanning UHF RFID Reader Antenna With High Gain and Wide Axial Ratio Beamwidth

Chen

Yang

Ndifon

et al. 2020

IEEE J. Radio Freq. Identif.

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“…Finally, we obtain another 1000 measurement samples with the same simulation setup as test dataset. The cost is computed according to equation (5). The cost of RTS model on test dataset is 0.1278, while the cost of TS model is 0.1502.…”

Section: Detection Probability Modelmentioning

confidence: 99%

“…2 The majority of state-of-the-art UHF RFID localization methods are based on the fusion of relevant information of RF signals returned to RFID reader from tags. Examples of such information include received signal strength indicator (RSSI), 3 angle of arrival (AoA), 4,5 time of arrival (ToA) 6 phase of arrival (PoA) 7,8 and time difference of arrival (TDoA). 2 The major problem with the above methods is that they are easily affected by the non-line-of-sight (NLoS) conditions, severe multipath distortions and fast temporal changes of indoor environment.…”

Section: Introductionmentioning

confidence: 99%

Indoor localization using augmented ultra-high-frequency radio frequency identification system for Internet of Things

Jing

Bolić

2017

International Journal of Distributed Sensor Networks

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This article addresses the problem of indoor localization with an augmented ultra-high-frequency radio frequency identification system. In the infrastructure of augmented ultra-high-frequency radio frequency identification system, a tag-like component called sense-a-tag applies envelope detection to capture the backscatter signals of other ultra-high-frequency tags in its proximity during their tag-to-reader communication. Such unique capability of sense-a-tag enables tag-to-tag backscatter communication. Tag-to-tag backscattering communication in augmented ultra-high-frequency radio frequency identification system has an obvious advantage over the conventional reader-to-tag link for proximity-based indoor localization by keeping both landmark and mobile tags simple and inexpensive. Through the investigation of tag-to-tag backscattering communication link, a new and more realistic probability model of detecting a tag by sense-a-tag is proposed. In augmented ultra-high-frequency radio frequency identification system, a large set of passive tags are placed at known locations as landmarks, and sense-a-tags are attached mobile targets of interest. We identify two technical roadblocks of augmented ultra-high-frequency radio frequency identification system and existing localization algorithms as false synchronous detection assumption and state evolution model constraints. With the new and more realistic detection probability model, we explore the use of particle filtering methodology for localizing sense-a-tag, which overcomes the aforementioned roadblocks. The performance of localization algorithm is demonstrated by extensive computer simulations.

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“…The use of phased array antennas in both the uplink and downlink has also been reported to increase tag read range, as the spatial selectivity of phased arrays allows multiple paths to be minimised or altered, thereby overcoming fading [7][8][9][10][11][12][13][14]. Phased arrays have also been used to obtain localisation of passive tags [15][16][17][18]. As a result, several commercial providers have developed phased array RFID antennas with multiple and switched beam configurations [19].…”

Section: Introductionmentioning

confidence: 99%

Enhanced RFID tag detection accuracy using distributed antenna arrays

Ndifon

Crisp

Penty

et al. 2018

2018 IEEE International Conference on RFID (RFID)

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An Ultra High Frequency (UHF) Radio Frequency Identification (RFID) system using distributed antenna arrays for interrogating RFID tags in a highly multipath environment is demonstrated. The system makes use of phase diversity and beam steering to overcome fading. The tag detection accuracy is compared to a standard fixed antenna system, showing that the presented system is able to deliver more power to the more challenging tags, and therefore is capable of a higher tag read success rate. It is also shown that, whereas a fixed antenna is capable of scanning a single cell, the ability of a phased array to scan through 360° azimuth leads to a reduction in number of antennas required for a multicell system. The experimental results are validated using a 3D field-based propagation model, which enables visualisation of the power distribution in the field of interest, and provides insight into the improved system performance.

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UHF RFID localization system based on a phased array antenna

Cited by 43 publications

References 7 publications

Beam Scanning UHF RFID Reader Antenna With High Gain and Wide Axial Ratio Beamwidth

Beam Scanning UHF RFID Reader Antenna With High Gain and Wide Axial Ratio Beamwidth

Indoor localization using augmented ultra-high-frequency radio frequency identification system for Internet of Things

Enhanced RFID tag detection accuracy using distributed antenna arrays

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