<p>This article represents amalgamation of three matching techniques i.e. Meandered Inductively-coupled loop (MIL), T-matching network and Nested slot, in the interest of outlining a planar UHF RFID tag antenna. The tag antenna has volume of 76 mm<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11277_2025_11837_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>30 mm<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11277_2025_11837_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>1.6 mm (0.228<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11277_2025_11837_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _{0}\times\)</EquationSource> </InlineEquation>0.0902<InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11277_2025_11837_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _{0}\times\)</EquationSource> </InlineEquation>0.0048<InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11277_2025_11837_Article_IEq5.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _{0})\)</EquationSource> </InlineEquation>. This compact planar structure of tendered antenna can decrease mass production cost of tags in comparison with non-planar tag antennas. Moreover, the slot based T-matching and MIL network rotation, can be tuned in wide-range for impedance matching. The tendered tag design is simulated using Ansys HFSS-2020R1 and fabricated. The simulated and measured return loss at 902 MHz are -16.8 and -21 dB, respectively. The presented tag antenna exhibits 37% of radiation efficiency with realized gain of 1.03 dBi. This compact planar tag antenna extends its read range upto 14.1m.</p>

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A Combined Matching Approaches Based UHF RFID Planar Tag Antenna

  • Amit Kumar Singh,
  • Azharuddin Khan,
  • A. K. Singh

摘要

This article represents amalgamation of three matching techniques i.e. Meandered Inductively-coupled loop (MIL), T-matching network and Nested slot, in the interest of outlining a planar UHF RFID tag antenna. The tag antenna has volume of 76 mm \(\times\) 30 mm \(\times\) 1.6 mm (0.228 \(\lambda _{0}\times\) 0.0902 \(\lambda _{0}\times\) 0.0048 \(\lambda _{0})\) . This compact planar structure of tendered antenna can decrease mass production cost of tags in comparison with non-planar tag antennas. Moreover, the slot based T-matching and MIL network rotation, can be tuned in wide-range for impedance matching. The tendered tag design is simulated using Ansys HFSS-2020R1 and fabricated. The simulated and measured return loss at 902 MHz are -16.8 and -21 dB, respectively. The presented tag antenna exhibits 37% of radiation efficiency with realized gain of 1.03 dBi. This compact planar tag antenna extends its read range upto 14.1m.