An error free passive UHF RFID system using a new form of wireless signal distribution

Sabesan, S.; Crisp, Michael; Penty, R.V.; White, I.H.

doi:10.1109/rfid.2012.6193057

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…The environmental factors affect the magnetic flux and weaken the radio frequency signal [42]. They include multipath fading issues [43], the presence of metal and liquid in the vicinity of the tag, and so on. Furthermore, little research has focused on dynamic RFID tracking in supply-chain scenarios [44].…”

Section: Tracking Technologiesmentioning

confidence: 99%

A Coordinated Approach for Supply-Chain Tracking in the Liquefied Natural Gas Industry

et al. 2018

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With the increased size and complexity of liquefied natural gas (LNG) projects, supply-chain management has become a challenging process due to involvements of the remote location of the project site and the multiple stakeholders. The transparency and traceability of the supply-chain are critical as any surpluses or shortages of materials will put the project at risk. Currently, limited research has been conducted on LNG projects considering the total supply-chain perspective, which refers to all stages of materials tracking in off-site manufacturing, transportation, and site logistics. The purpose of this research is to propose a framework of a coordinated approach for supply-chain tracking in the LNG industry. Two focus group studies were organized to develop the proposed framework: One for LNG construction supply chain process development, and another for alternative tracking technologies selection. In addition, two experiments, namely off-site fabrication tracking and site logistics tracking, were conducted in a field to evaluate the feasibility of the proposed framework. Technology limitations were also discussed in terms of field implementation.

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Section: Tracking Technologiesmentioning

confidence: 99%

A Coordinated Approach for Supply-Chain Tracking in the Liquefied Natural Gas Industry

et al. 2018

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“…Employing the MIMO technique in the RFID system can obtain the enhancement of the fading depth. A distributed antenna system (DAS) for RFID has been designed to compare with conventional single-antenna RFID system [18]. Multiple transmitting and receiving antenna elements as a reader locate in different places.…”

Section: Introductionmentioning

confidence: 99%

Compact Dual-Band Circularly Polarized Stacked Patch Antenna for Microwave-Radio-Frequency Identification Multiple-Input-Multiple-Output Application

Enze

Michel

Nepa

et al. 2021

International Journal of Antennas and Propagation

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A compact, low-profile, two-port dual-band circularly polarized (CP) stacked patch antenna for radio-frequency identification (RFID) multiple-input-multiple-output (MIMO) readers is proposed, which employs the shared-aperture technique. The proposed antenna adopts a 1.524 mm thickness Rogers Ro4350b substrate with relative permittivity of 3.48. Two pairs of isolated ports are working at two microwave- (MW-) RFID bands (2.4–2.485 GHz and 5.725–5.875 GHz) with high port isolation of 25 dB and 30 dB, respectively. A shared metal slot layer is designed to separate two feeding structures of the lower band and upper band for port isolation enhancement as well as saving space. Corner-truncated square slot and patch configurations have been designed to obtain CP modes. In the lower and upper MW-RFID bands, the relative impedance bandwidths are 12.2% and 5.7%, and the maximum realized gains are higher than 7.3 dBic. Moreover, two-element configurations have been combined for an RFID MIMO system that occupies a dimension of 119 mm × 119 mm × 12.9 mm. The MIMO antenna performance of envelope correlation coefficient (ECC) is lower than 0.03, and diversity gain is close to 10 dB.

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“…In [18], the SISO RFID and MIMO RFID channel's multipath fading are compared, and the MIMO RFID technique can effectively enhance the fading depth. A distributed antenna system (DAS) for RFID is proposed to compare with a single-antenna RFID system [19]. When the DAS RFID system works in a 10 m 2 space, it can obtain a successful reading rate of 100%.…”

Section: Introductionmentioning

confidence: 99%

Compact Four-Port Dual-Sense Circularly Polarized Stack-Up Patch Antenna for UHF/MW-RFID MIMO System

Enze

Qiu

2021

International Journal of Antennas and Propagation

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A four-port dual-band dual circularly polarized (CP) stack-up patch antenna is introduced for multiple-input-multiple-output (MIMO) RFID application. The proposed antenna adopts two FR 4 substrates and one Rogers Ro4350b substrates. Two pairs of isolated ports work at FCC UHF/MW-RFID bands (0.902–0.928 and 2.4–2.485 GHz) with port isolations of 20 dB and 25 dB, respectively. Four inverted-F radiating elements fed with a 90° phase-delay feeding network realize the CP radiation at the FCC UHF-RFID band (0.902–0.928 GHz). The corner-truncated square slot and patch are implemented to obtain CP modes at the MW-RFID band. The relative impedance bandwidths in the FCC UHF and MW band are 10.9% and 9.4%, respectively, with peak gains of 4.1 and 7.2 dBic. The antenna’s MIMO performance of envelope correlation coefficient (ECC) is lower than 0.01, and diversity gain (DG) is close to 10 dB. Thanks to the stack-up configuration, the dual-band RFID antenna realizes good antenna performance with a compact size of 0.6 × 0.6 × 0.07 λ3.

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An error free passive UHF RFID system using a new form of wireless signal distribution

Cited by 11 publications

References 18 publications

A Coordinated Approach for Supply-Chain Tracking in the Liquefied Natural Gas Industry

A Coordinated Approach for Supply-Chain Tracking in the Liquefied Natural Gas Industry

Compact Dual-Band Circularly Polarized Stacked Patch Antenna for Microwave-Radio-Frequency Identification Multiple-Input-Multiple-Output Application

Compact Four-Port Dual-Sense Circularly Polarized Stack-Up Patch Antenna for UHF/MW-RFID MIMO System

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