Design of a wideband inductively coupled loop feed patch antenna for UHF RFID tag
A planar wideband patch antenna for ultra-high frequency (UHF) radio frequ ency identification (RFID) tag for metallic applications is presented in this research work. Three different shape patches ar e inductively coupled to a triangle loop to form wi de impedance bandwidth for uni-...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Czech Technical University
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/43730/ http://irep.iium.edu.my/43730/ http://irep.iium.edu.my/43730/ http://irep.iium.edu.my/43730/1/15_01_0038_0044_Radioengineering_2015.pdf |
| Summary: | A planar wideband patch antenna for ultra-high
frequency (UHF) radio frequ
ency identification (RFID) tag
for metallic applications is presented
in this research work.
Three different shape patches ar
e inductively coupled to
a triangle loop to form wi
de impedance bandwidth for uni-
versal application UHF (860
–
960 MHz) RFID. The struc-
ture of the proposed antenna exhibits planar profile to
provide ease of fabrication for cost
reduction well suited
for mass production. The simulation of the antenna was
carried out using Finite Elemen
t Method (FEM) based
software, Ansoft HFSS v13.
The simulated and measured
impedance bandwidth of 113 MHz and 117 MHz (Return
Loss
≥
6 dB) were achieved to cover the entire UHF RFID
operating frequency band worldwide. The simulated and
measured radiation patterns
at the operating frequency of
915 MHz are in good agreement. Moreover the simulated
maximum antenna gain at th
e bore sight direction in free
space and when mounted on 200
×
200 mm
2
metal plate
are -5.5 dBi and -9 dBi res
pectively which is enough to
provide reasonable read range
over the entire UHF RFID
system operating band. |
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