An Electrically Small Spherical UHF RFID Tag Antenna With Quasi-Isotropic Patterns for Wireless Sensor Networks

Hong Kyun Ryu; Gichul Jung; Dea Keun Ju; Sungkyun Lim; Jong Myung Woo

doi:10.1109/LAWP.2010.2043046

An Electrically Small Spherical UHF RFID Tag Antenna With Quasi-Isotropic Patterns for Wireless Sensor Networks

Hong Kyun Ryu
, Gichul Jung
, Dea Keun Ju
, Sungkyun Lim
, Jong Myung Woo

Electrical & Computer Engineering

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

47 Scopus citations

Abstract

An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24. A short stub is employed for good conjugate impedance matching with a RFID chip (Z chip = 14 - j145 ¿). The designed antenna has a -10-dB bandwidth of 7 MHz (0.77%) and the maximum readable distance of 132 cm at 5.2 W EIRP.

Original language	American English
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	9
DOIs	https://doi.org/10.1109/LAWP.2010.2043046
State	Published - Feb 17 2010

Disciplines

Engineering
Computer Engineering

Keywords

Electrically small antennas
quasi-isotropic patterns
radio frequency identification (RFID) tag antennas

Access to Document

10.1109/LAWP.2010.2043046License: Unspecified

Cite this

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title = "An Electrically Small Spherical UHF RFID Tag Antenna With Quasi-Isotropic Patterns for Wireless Sensor Networks",

abstract = " An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24. A short stub is employed for good conjugate impedance matching with a RFID chip (Z chip = 14 - j145 ¿). The designed antenna has a -10-dB bandwidth of 7 MHz (0.77\%) and the maximum readable distance of 132 cm at 5.2 W EIRP. ",

keywords = "Electrically small antennas, quasi-isotropic patterns, radio frequency identification (RFID) tag antennas",

author = "Ryu, \{Hong Kyun\} and Gichul Jung and Ju, \{Dea Keun\} and Sungkyun Lim and Woo, \{Jong Myung\}",

note = "An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24.",

year = "2010",

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day = "17",

doi = "10.1109/LAWP.2010.2043046",

language = "American English",

volume = "9",

journal = "IEEE Antennas and Wireless Propagation Letters",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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AU - Ryu, Hong Kyun

AU - Jung, Gichul

AU - Ju, Dea Keun

AU - Lim, Sungkyun

AU - Woo, Jong Myung

N1 - An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24.

PY - 2010/2/17

Y1 - 2010/2/17

N2 - An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24. A short stub is employed for good conjugate impedance matching with a RFID chip (Z chip = 14 - j145 ¿). The designed antenna has a -10-dB bandwidth of 7 MHz (0.77%) and the maximum readable distance of 132 cm at 5.2 W EIRP.

AB - An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076¿), and the resulting electrical size is a kr of 0.24. A short stub is employed for good conjugate impedance matching with a RFID chip (Z chip = 14 - j145 ¿). The designed antenna has a -10-dB bandwidth of 7 MHz (0.77%) and the maximum readable distance of 132 cm at 5.2 W EIRP.

KW - Electrically small antennas

KW - quasi-isotropic patterns

KW - radio frequency identification (RFID) tag antennas

UR - https://doi.org/10.1109/LAWP.2010.2043046

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DO - 10.1109/LAWP.2010.2043046

M3 - Article

SN - 1536-1225

VL - 9

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

An Electrically Small Spherical UHF RFID Tag Antenna With Quasi-Isotropic Patterns for Wireless Sensor Networks

Abstract

Disciplines

Keywords

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