<p>This research paper focusses on the development of a triple stop-band frequency-selective surface (FSS) positioned on an FR4 dielectric material with the substrate dimension of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$0.08\lambda_{0} \times 0.08\lambda_{0}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0.08</mn> <msub> <mi>λ</mi> <mn>0</mn> </msub> <mo>×</mo> <mn>0.08</mn> <msub> <mi>λ</mi> <mn>0</mn> </msub> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$\lambda_{0}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>λ</mi> <mn>0</mn> </msub> </math></EquationSource> </InlineEquation> is the free-space wavelength of the lowest resonance at 2.4 GHz. The triple stop-band phenomenon is simple and attractive considering the simple structure, size, design methodology and angular stability. <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$S_{21}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>S</mi> <mn>21</mn> </msub> </math></EquationSource> </InlineEquation> is the measure of the fabricated FSS for different elevation angles under transverse electric (TE) and transverse magnetic (TM) polarisations. The proposed polarisation-insensitive structure covers three valuable stop bands of 2.15–2.59 GHz, 4–5.65 GHz and 7.25–9.2 GHz at 2.4, 5.1 and 8.2 GHz for EM shielding. An angular stability of <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$80^{\circ }$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>80</mn> <mo>∘</mo> </msup> </math></EquationSource> </InlineEquation> with a minimum frequency ratio of 1.62 is achieved. It can be used for WiFi, WLAN and X-band satellite applications.</p>

Enhancement of the performance of electromagnetic shielding of a microstructure using surface current

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发表日期：

2026年3月4日

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Kalyan Mondal,
Vanlalhmangaihsanga

摘要

This research paper focusses on the development of a triple stop-band frequency-selective surface (FSS) positioned on an FR4 dielectric material with the substrate dimension of $0.08\lambda_{0} \times 0.08\lambda_{0}$ $0.08 λ_{0} \times 0.08 λ_{0}$ , where $\lambda_{0}$ $λ_{0}$ is the free-space wavelength of the lowest resonance at 2.4 GHz. The triple stop-band phenomenon is simple and attractive considering the simple structure, size, design methodology and angular stability. $S_{21}$ $S_{21}$ is the measure of the fabricated FSS for different elevation angles under transverse electric (TE) and transverse magnetic (TM) polarisations. The proposed polarisation-insensitive structure covers three valuable stop bands of 2.15–2.59 GHz, 4–5.65 GHz and 7.25–9.2 GHz at 2.4, 5.1 and 8.2 GHz for EM shielding. An angular stability of $80^{\circ }$ $80^{\circ}$ with a minimum frequency ratio of 1.62 is achieved. It can be used for WiFi, WLAN and X-band satellite applications.