UHF RFID Antenna Impedance Characterization: Numerical Simulation of Interconnection Effects on the Antenna Impedance

Thomas Bauernfeind*, Werner Renhart, Piergiorgio Alotto, Oszkar Biro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A major design criterion of wireless communication devices is the matching between the impedance of the analog frontend and the input impedance of the antenna structure. Especially for passive communication systems, the matching is essential to ensure good performance. Numerical design tools are typically utilized in the antenna design process to determine the antenna impedance. Additionally, measurements on prototype designs are carried out to verify the simulation results. Frequently, vector network or impedance analyzers are used to measure the impedance of the antenna design. Regardless of the measurement device in use, a connection between it and the device under test has to be established. In this paper, the interaction between the interconnection structure and the antenna under test is investigated. Special attention is paid to the influence of the interconnection structure on the antenna impedance obtained. The investigations are carried out on a typical test problem by numerical field simulations by means of the finite-element method.

Original languageEnglish
Article number7827109
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 1 Jun 2017


  • Antenna impedance
  • dipole antennas
  • finite-element analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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