Automated Rfid-Based Identification System for Steel Coils

Kim, Myung-Sik; Kim, Kwangsoo

doi:10.2528/pier12062906

Cited by 14 publications

(8 citation statements)

References 19 publications

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“…Given a proper spur line length, these two orthogonal modes can achieve 90-degree phase difference, resulting in an LHCP radiation in +ẑ direction while an RHCP in −ẑ direction. The operating frequencies 890 MHz and 1 GHz obtained by (1) were roughly the same as the frequencies 890 MHz and 1020 MHz where the lowest axial ratio was located as shown in Figure 3(b). With these two adjacent frequencies merged together, the AR bandwidth was enhanced.…”

Section: Proposed Antenna Configurationsupporting

confidence: 56%

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A Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Uhf Rfid Applications

Zhang¹,

Huang²,

Yin³

2014

PIER C

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Abstract-A broadband CPW-fed circularly polarized square slot antenna for ultra-high-frequency (UHF) radio frequency identification (RFID) applications is proposed. It consists of a square slot embedded with a spur line along diagonal and an F-shaped feeding structure. The proposed antenna achieves an impedance bandwidth about 307 MHz (34.6% @886 MHz) and a 3 dB axial ratio (AR) bandwidth about 232 MHz (24.3% @954 MHz). The 3 dB AR beam-width is about 96 degrees over the UHF band of 840-960 MHz. The proposed reader antenna based on CPW structure is easy to integrate. With the symmetry and bidirectional radiation pattern, there are less readers needed in some applications, such as access control, than the reader with unidirectional pattern, which will definitely decrease the implemented cost. Therefore, this universal design with desired performance across the entire UHF RFID band (from 840 MHz to 960 MHz) can be applied to all the UHF RFID applications worldwide. Detailed considerations of the design and main parameters will be studied in this paper.

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Section: Proposed Antenna Configurationsupporting

confidence: 56%

“…Radio frequency identification (RFID) is a technique used for identification and tracking of objects by means of electromagnetic waves [1]. In recent years, RFID technology has been rapidly developed and applied to many service industries, distribution logistics, manufacturing companies, and goods flow systems [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

A Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Uhf Rfid Applications

Zhang¹,

Huang²,

Yin³

2014

PIER C

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“…However, there are different frequency bands for UHF RFID application in different regions [4], such as 952-955 MHz in Japan, 840.5-844.5 MHz and 920.5-924.5 MHz in China, 866-869 MHz in Europe, and 920-926 MHz in Australia. Therefore, a UHF RFID antenna with wide frequency band is necessary.…”

Section: Introductionmentioning

confidence: 99%

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

Wang¹,

Liu²,

Li³

et al. 2017

PIER Letters

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Abstract-A broadband ultra-high-frequency (UHF) Radio Frequency Identification (RFID) antenna using double-tuned impedance matching theory is proposed. This paper presents a proximity coupled vertical meandered strip feed technique based on double-tuned impedance match which results in a wide bandwidth. This antenna mainly consists of a rectangular ground plane, a U-shaped radiation patch, and a suspended vertical meandered strip (VMS) by mesas of rotated Γ-shaped strip. The Ushaped radiation patch is fed by the VMS. The simulated and measured results show that the antenna has a very wide impedance matching bandwidth of 150 MHz (820-970 MHz) or 16.8% with the voltage standing wave ration (VSWR) less than 1.5 and achieves a high gain level about 8.5 dBi. Therefore, the proposed antenna can cover the entire UHF band of 840-960 MHz and is a good candidate for universal UHF RFID applications.

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“…Radio frequency identification (RFID) is a technique used for identification and tracking of objects by means of electromagnetic waves [1]. Such a technology has become very popular in the recent years, and it covers different spectrum locations in the ultra high frequency (UHF) band, according to worldwide regulations.…”

Section: Introductionmentioning

confidence: 99%

Free-Space and on-Metal Dual-Band Tag for Uhf-Rfid Applications in Europe and Usa

Paredes

Zamora²,

Zuffanelli³

et al. 2013

PIER

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Abstract-In this paper, we present an UHF-RFID tag mountable on metallic surfaces and capable to operate in the assigned frequency bands in Europe (866-869 MHz) and USA (902-928 MHz). Due to the proximity of these frequency bands, the dual-band functionality can be achieved through a perturbation method applied to a single band tag designed to operate at the intermediate frequency. The tag consists of an integrated circuit, an impedance matching network (where the perturbation method is applied) and a patch antenna. The considered antenna has been chosen because it has high efficiency over metallic surfaces. The whole tag has been analyzed, designed and finally fabricated. The read ranges measured in free-space are 9.5 m and 7.5 m at the European and USA frequency bands, respectively. By placing the tag on a metal surface, the read ranges increase up to 14 m and almost 11 m, respectively.

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Automated Rfid-Based Identification System for Steel Coils

Cited by 14 publications

References 19 publications

A Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Uhf Rfid Applications

A Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Uhf Rfid Applications

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

Free-Space and on-Metal Dual-Band Tag for Uhf-Rfid Applications in Europe and Usa

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