Design of UHF fractal antenna for localized near-field RFID application

Yonghui Tao; Erfu Yang; Yaxian Dong; Gang Wang

doi:10.1002/mop.30546

Design of UHF fractal antenna for localized near-field RFID application

Yonghui Tao, Erfu Yang, Yaxian Dong, Gang Wang^*

^*Corresponding author for this work

University Of Strathclyde

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

70 Downloads (Pure)

Abstract

In this article, fractal structure is proposed for localized near-field UHF antenna of radio frequency identification (RFID) reader. In the design, traditional Koch fractal structure is modified by converting the direction of one fractal structure of each line segment. Parameters of the fractal structure are optimized to acquire strong and uniform magnetic field distribution within an interrogation zone at designated height over the antenna. Two Koch fractal near-field antennas fed from center or side are presented. And the side-fed fractal near-field antenna is fabricated and tested to demonstrate a localized coverage area with a perimeter of two wavelengths within a reading distance of 35mm above the antenna. For distance above 35mm, a sharp decrease of reading rate is observed, which demonstrates a satisfactory near-field UHF antenna.

Original language	English
Pages (from-to)	1390-1394
Number of pages	5
Journal	Microwave and Optical Technology Letters
Volume	59
Issue number	6
Early online date	30 Mar 2017
DOIs	https://doi.org/10.1002/mop.30546
Publication status	Published - 1 Jun 2017

Keywords

antenna
Koch fractal
near-field
radio frequency identification
UHF

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10.1002/mop.30546

Tao-etal-MOTL-Design-of-UHF-fractal-antennaAccepted author manuscript, 749 KBLicence: CC BY-NC 4.0

Cite this

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abstract = "In this article, fractal structure is proposed for localized near-field UHF antenna of radio frequency identification (RFID) reader. In the design, traditional Koch fractal structure is modified by converting the direction of one fractal structure of each line segment. Parameters of the fractal structure are optimized to acquire strong and uniform magnetic field distribution within an interrogation zone at designated height over the antenna. Two Koch fractal near-field antennas fed from center or side are presented. And the side-fed fractal near-field antenna is fabricated and tested to demonstrate a localized coverage area with a perimeter of two wavelengths within a reading distance of 35mm above the antenna. For distance above 35mm, a sharp decrease of reading rate is observed, which demonstrates a satisfactory near-field UHF antenna.",

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AB - In this article, fractal structure is proposed for localized near-field UHF antenna of radio frequency identification (RFID) reader. In the design, traditional Koch fractal structure is modified by converting the direction of one fractal structure of each line segment. Parameters of the fractal structure are optimized to acquire strong and uniform magnetic field distribution within an interrogation zone at designated height over the antenna. Two Koch fractal near-field antennas fed from center or side are presented. And the side-fed fractal near-field antenna is fabricated and tested to demonstrate a localized coverage area with a perimeter of two wavelengths within a reading distance of 35mm above the antenna. For distance above 35mm, a sharp decrease of reading rate is observed, which demonstrates a satisfactory near-field UHF antenna.

KW - antenna

KW - Koch fractal

KW - near-field

KW - radio frequency identification

KW - UHF

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Design of UHF fractal antenna for localized near-field RFID application

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