Backscattering-based measurement of reactive antenna input impedance

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

A scattering technique for measuring reactive antenna input impedance is described. The antenna scattering is measured with three different loads: an open circuit, a conjugate match, and a reactive match. The load reactances tune the antenna into resonance at the measurement band. Theory and error considerations are presented, as well as measurement results of two ultra high frequency radio frequency identification antennas. The measurements were performed in a gigahertz transverse electromagnetic mode cell. The measured impedances are within about 10% of the simulated values for a dipole-like antenna. The results of a planar inverted-F antenna are somewhat more complex, but also supported by the presented simulations and the coaxial impedance measurement results.
Original languageEnglish
Pages (from-to)469 - 474
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume56
Issue number2
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

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Backscattering
Antennas
Scattering
Radio frequency identification (RFID)
Networks (circuits)

Keywords

  • Antenna impedance
  • backscattering
  • radio frequency identification (RFID)
  • ultra high frequency (UHF)

Cite this

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title = "Backscattering-based measurement of reactive antenna input impedance",
abstract = "A scattering technique for measuring reactive antenna input impedance is described. The antenna scattering is measured with three different loads: an open circuit, a conjugate match, and a reactive match. The load reactances tune the antenna into resonance at the measurement band. Theory and error considerations are presented, as well as measurement results of two ultra high frequency radio frequency identification antennas. The measurements were performed in a gigahertz transverse electromagnetic mode cell. The measured impedances are within about 10{\%} of the simulated values for a dipole-like antenna. The results of a planar inverted-F antenna are somewhat more complex, but also supported by the presented simulations and the coaxial impedance measurement results.",
keywords = "Antenna impedance, backscattering, radio frequency identification (RFID), ultra high frequency (UHF)",
author = "Pekka Pursula and Dan Sandstr{\"o}m and Kaarle Jaakkola",
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Backscattering-based measurement of reactive antenna input impedance. / Pursula, Pekka; Sandström, Dan; Jaakkola, Kaarle.

In: IEEE Transactions on Antennas and Propagation, Vol. 56, No. 2, 2008, p. 469 - 474.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Backscattering-based measurement of reactive antenna input impedance

AU - Pursula, Pekka

AU - Sandström, Dan

AU - Jaakkola, Kaarle

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N2 - A scattering technique for measuring reactive antenna input impedance is described. The antenna scattering is measured with three different loads: an open circuit, a conjugate match, and a reactive match. The load reactances tune the antenna into resonance at the measurement band. Theory and error considerations are presented, as well as measurement results of two ultra high frequency radio frequency identification antennas. The measurements were performed in a gigahertz transverse electromagnetic mode cell. The measured impedances are within about 10% of the simulated values for a dipole-like antenna. The results of a planar inverted-F antenna are somewhat more complex, but also supported by the presented simulations and the coaxial impedance measurement results.

AB - A scattering technique for measuring reactive antenna input impedance is described. The antenna scattering is measured with three different loads: an open circuit, a conjugate match, and a reactive match. The load reactances tune the antenna into resonance at the measurement band. Theory and error considerations are presented, as well as measurement results of two ultra high frequency radio frequency identification antennas. The measurements were performed in a gigahertz transverse electromagnetic mode cell. The measured impedances are within about 10% of the simulated values for a dipole-like antenna. The results of a planar inverted-F antenna are somewhat more complex, but also supported by the presented simulations and the coaxial impedance measurement results.

KW - Antenna impedance

KW - backscattering

KW - radio frequency identification (RFID)

KW - ultra high frequency (UHF)

U2 - 10.1109/TAP.2007.915425

DO - 10.1109/TAP.2007.915425

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