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<p>This research investigates the potential of a sectoral Cylindrical Dielectric Resonator Antenna (CDRA) for biomedical telemetry. CDRAs are known for their low-loss, ruggedness, and stability, but their limited bandwidth and size make them unsuitable for wearable devices. The research addresses these limitations by proposing a dual-mode antenna that operates in <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_17595_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:{EH}_{110}\)</EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_17595_Article_IEq2.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="45" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:{TE}_{210}\)</EquationSource> </InlineEquation> modes. The sectoral CDRA is a quarter segment with Perfect Electric Conductor boundaries, reducing its size by a factor of four. Mathematical derivations of the field components for both modes are derived to support the design. To minimize specific absorption rate (SAR), an Artificial Magnetic Conductor (AMC) surface is applied to the antenna’s backside, enhancing compatibility with the transverse electric modes. The antenna achieves a bandwidth of 0.7&#xa0;GHz (5.2–5.9&#xa0;GHz), suitable for biomedical applications, with a measured peak gain of 7.9 dBi and a SAR of 1.24&#xa0;W/kg when applied to a human arm.</p>

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Artificial magnetic conductor backed dual-mode sectoral cylindrical DRA for off-body biomedical telemetry

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月29日

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  • Nayab Gogosh,
  • Sohail Khalid,
  • Bilal Tariq Malik,
  • Slawomir Koziel

摘要

This research investigates the potential of a sectoral Cylindrical Dielectric Resonator Antenna (CDRA) for biomedical telemetry. CDRAs are known for their low-loss, ruggedness, and stability, but their limited bandwidth and size make them unsuitable for wearable devices. The research addresses these limitations by proposing a dual-mode antenna that operates in \(\:{EH}_{110}\) and \(\:{TE}_{210}\) modes. The sectoral CDRA is a quarter segment with Perfect Electric Conductor boundaries, reducing its size by a factor of four. Mathematical derivations of the field components for both modes are derived to support the design. To minimize specific absorption rate (SAR), an Artificial Magnetic Conductor (AMC) surface is applied to the antenna’s backside, enhancing compatibility with the transverse electric modes. The antenna achieves a bandwidth of 0.7 GHz (5.2–5.9 GHz), suitable for biomedical applications, with a measured peak gain of 7.9 dBi and a SAR of 1.24 W/kg when applied to a human arm.