Scholarlink

<p>A promising technique for lowering interference is to absorb electromagnetic (EM) energy and partially transform it into heat. EM absorbers are able to achieve this phenomenon. Most electromagnetic absorbers are based on metamaterials and can absorb a broad range of frequencies. However, for specific applications, a resonant absorber is needed. In this paper, a purely water based, frequency selective surface (FSS) resonant absorber is proposed. The structural design of the proposed absorber consists of an array of square shaped cavities made of acrylic sheet for holding the water. The ground plane made of conducting foil/tape is placed at the bottom. The dimension of the unit cell is 0.45<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _l\)</EquationSource> </InlineEquation><InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq2.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> 0.45<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _l\)</EquationSource> </InlineEquation><InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq2.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> 0.05<InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _l\)</EquationSource> </InlineEquation> where, <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _l\)</EquationSource> </InlineEquation> is the wavelength at the lowest operating frequency. The EM absorber shows more than 99.99<InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq7.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\%\)</EquationSource> </InlineEquation> absorption and 17.14<InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2449_Article_IEq7.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\%\)</EquationSource> </InlineEquation> fractional bandwidth (FBW) at resonating frequency of 3.5 GHz at different polarization angles, make it suitable for WiMax/CBRS/n78 5G band application. The performance of the proposed absorber is analyzed both through simulation and measurement. A comparison between the simulated and the measured results shows good agreement.&#xa0;&#xa0;</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A low cost all-dielectric water based resonant absorber

  • 期刊论文

  • 发表日期：

    2025年6月24日

查看全文
  • Avinash,
  • Nisha Gupta

摘要

A promising technique for lowering interference is to absorb electromagnetic (EM) energy and partially transform it into heat. EM absorbers are able to achieve this phenomenon. Most electromagnetic absorbers are based on metamaterials and can absorb a broad range of frequencies. However, for specific applications, a resonant absorber is needed. In this paper, a purely water based, frequency selective surface (FSS) resonant absorber is proposed. The structural design of the proposed absorber consists of an array of square shaped cavities made of acrylic sheet for holding the water. The ground plane made of conducting foil/tape is placed at the bottom. The dimension of the unit cell is 0.45 \(\lambda _l\) \(\times\) 0.45 \(\lambda _l\) \(\times\) 0.05 \(\lambda _l\) where, \(\lambda _l\) is the wavelength at the lowest operating frequency. The EM absorber shows more than 99.99 \(\%\) absorption and 17.14 \(\%\) fractional bandwidth (FBW) at resonating frequency of 3.5 GHz at different polarization angles, make it suitable for WiMax/CBRS/n78 5G band application. The performance of the proposed absorber is analyzed both through simulation and measurement. A comparison between the simulated and the measured results shows good agreement.