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

Rui Chen; Shuai Yang; Ajeck M. Ndifon; Ian H. White; Richard V. Penty; Michael Crisp

doi:10.1109/JRFID.2020.2994447

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

Rui Chen, Shuai Yang, Ajeck M. Ndifon, Ian H. White, Richard V. Penty, Michael Crisp

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

Abstract

A novel ultra-high-frequency (UHF) RFID reader antenna is proposed, designed and measured. The proposed antenna is capable of 2-dimensional (2D) beam-scanning from 0° to 360° in the azimuth plane, and 0° to 40° in the zenith plane. The minima of the antenna's axial ratio (AR) follows its gain maxima during beam-scanning, resulting in an equivalent 3 dB AR beamwidth of over 136° for every phi cut. Moreover, the antenna's AR can be easily modified without affecting other parameters. It is shown experimentally that the antenna's 2D beam-scanning ability and the improved AR performance lead to better tag-reading results, improving the percentage of missing tags by up to 21.6% compared to a standard antenna which has a degraded AR and only supports 1D beam-scanning. In addition, the antenna needs no matching network and has a -10 dB return loss bandwidth from 860 MHz to 880 MHz.

Original language	English
Article number	9097294
Pages (from-to)	468-475
Number of pages	8
Journal	IEEE Journal of Radio Frequency Identification
Volume	4
Issue number	4
Early online date	20 May 2020
DOIs	https://doi.org/10.1109/JRFID.2020.2994447
Publication status	Published - 31 Dec 2020

Keywords

Antenna arrays
phased arrays
radio-frequency identification
UHF antennas
UHF propagation

ASJC Scopus subject areas

Computer Networks and Communications
Instrumentation

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10.1109/JRFID.2020.2994447

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https://www.repository.cam.ac.uk/handle/1810/305304

Cite this

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title = "Beam Scanning UHF RFID Reader Antenna with High Gain and Wide Axial Ratio Beamwidth",

abstract = "A novel ultra-high-frequency (UHF) RFID reader antenna is proposed, designed and measured. The proposed antenna is capable of 2-dimensional (2D) beam-scanning from 0° to 360° in the azimuth plane, and 0° to 40° in the zenith plane. The minima of the antenna's axial ratio (AR) follows its gain maxima during beam-scanning, resulting in an equivalent 3 dB AR beamwidth of over 136° for every phi cut. Moreover, the antenna's AR can be easily modified without affecting other parameters. It is shown experimentally that the antenna's 2D beam-scanning ability and the improved AR performance lead to better tag-reading results, improving the percentage of missing tags by up to 21.6% compared to a standard antenna which has a degraded AR and only supports 1D beam-scanning. In addition, the antenna needs no matching network and has a -10 dB return loss bandwidth from 860 MHz to 880 MHz. ",

keywords = "Antenna arrays, phased arrays, radio-frequency identification, UHF antennas, UHF propagation",

author = "Rui Chen and Shuai Yang and Ndifon, {Ajeck M.} and White, {Ian H.} and Penty, {Richard V.} and Michael Crisp",

note = "Funding Information: This work was supported by the Engineering and Physical Sciences Research Council (Channel Optimised Distributed Passive Sensor Networks) under Grant EP/S-19405/1. ",

year = "2020",

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doi = "10.1109/JRFID.2020.2994447",

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AU - Chen, Rui

AU - Yang, Shuai

AU - Ndifon, Ajeck M.

AU - White, Ian H.

AU - Penty, Richard V.

AU - Crisp, Michael

N1 - Funding Information: This work was supported by the Engineering and Physical Sciences Research Council (Channel Optimised Distributed Passive Sensor Networks) under Grant EP/S-19405/1.

PY - 2020/12/31

Y1 - 2020/12/31

N2 - A novel ultra-high-frequency (UHF) RFID reader antenna is proposed, designed and measured. The proposed antenna is capable of 2-dimensional (2D) beam-scanning from 0° to 360° in the azimuth plane, and 0° to 40° in the zenith plane. The minima of the antenna's axial ratio (AR) follows its gain maxima during beam-scanning, resulting in an equivalent 3 dB AR beamwidth of over 136° for every phi cut. Moreover, the antenna's AR can be easily modified without affecting other parameters. It is shown experimentally that the antenna's 2D beam-scanning ability and the improved AR performance lead to better tag-reading results, improving the percentage of missing tags by up to 21.6% compared to a standard antenna which has a degraded AR and only supports 1D beam-scanning. In addition, the antenna needs no matching network and has a -10 dB return loss bandwidth from 860 MHz to 880 MHz.

AB - A novel ultra-high-frequency (UHF) RFID reader antenna is proposed, designed and measured. The proposed antenna is capable of 2-dimensional (2D) beam-scanning from 0° to 360° in the azimuth plane, and 0° to 40° in the zenith plane. The minima of the antenna's axial ratio (AR) follows its gain maxima during beam-scanning, resulting in an equivalent 3 dB AR beamwidth of over 136° for every phi cut. Moreover, the antenna's AR can be easily modified without affecting other parameters. It is shown experimentally that the antenna's 2D beam-scanning ability and the improved AR performance lead to better tag-reading results, improving the percentage of missing tags by up to 21.6% compared to a standard antenna which has a degraded AR and only supports 1D beam-scanning. In addition, the antenna needs no matching network and has a -10 dB return loss bandwidth from 860 MHz to 880 MHz.

KW - Antenna arrays

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KW - UHF antennas

KW - UHF propagation

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

Abstract

Keywords

ASJC Scopus subject areas

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