University of Illinois Urbana-Champaign

Design, Analysis, Fabrication and Test of an UHF (Ultra High Frequency) Passive RFID (Radio Frequency Identification) Tag Antenna

Singh, Simran

Content Files
ECE499-Fa2013-singh.pdf

Permalink

https://hdl.handle.net/2142/48767

Description

Title
Design, Analysis, Fabrication and Test of an UHF (Ultra High Frequency) Passive RFID (Radio Frequency Identification) Tag Antenna
Author(s)
Singh, Simran
Contributor(s)
Bernhard, Jennifer T.
Issue Date
2013-12
Keyword(s)
  • tag antenna
  • RFID
  • anechoic chamber
  • return loss
  • impedance matching
  • HFSS
  • radiation pattern
  • balun
  • gain
  • aperature size
Date of Ingest
2014-04-01T14:58:47Z
Abstract
Obtaining optimal antenna performance can be a great challenge, especially when working with electrically small antennas. This thesis provides an overview of the design, simulation, fabrication and test measurement setup for an ultra high frequency, electrically small, passive, RFID tag antenna operating in the 915 MHz ISM band (902-928 MHz). Key project topics include the following: Design motivation in coming up with antenna design; design simulations using Ansys HFSS (high frequency structure simulator), which is a commercial, finite element method solver for electromagnetic structures; design tradeoffs and constraints; fabricating the antenna and taking radiation pattern measurements inside an anechoic chamber using a balun; and investigating the discrepancies between simulated and measured results and approaches taken to minimize those discrepancies. At 915 MHz, the fabricated antenna achieves a return loss of 7.39 dB at a bandwidth of 40 MHz, VSWR of 2.4 and an input impedance of 28+j27Ω.
Type of Resource
text
Language
en
Permalink
http://hdl.handle.net/2142/48767

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