<p>In this work, a compact dual-band frequency selective surface (FSS) for path-loss and coverage improvement in advanced wireless communication is showcased. The proposed FSS is a single-layer design with stable and high performance at both 24 GHz and 38 GHz operating frequencies, respectively. The design is highly compact with two wide-band reflection coefficient responses having 49.5% (14.5–26.4 GHz) and 66.57% (35.8–39.8 GHz) bandwidth respectively. To the best of the author’s knowledge, the proposed structure is the most compact design reported thus far with <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_91884_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="111" /> </InlineMediaObject> <EquationSource Format="TEX">\(0.14\lambda _0 \times 0.14\lambda _0\)</EquationSource> </InlineEquation> electrical length at the lower cutoff frequency. With the proposed design architecture, it is easy to reconfigure the FSS. The small size of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_91884_Article_IEq2.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="115" /> </InlineMediaObject> <EquationSource Format="TEX">\(2.95 \times 2.95\,\hbox{mm}^2\)</EquationSource> </InlineEquation> enables effective operation in different communication environments. For coverage improvement and experimental validation, a <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_91884_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="54" /> </InlineMediaObject> <EquationSource Format="TEX">\(32 \times 32\)</EquationSource> </InlineEquation> element array of the total footprint of <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_91884_Article_IEq4.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(96 \times 96\,\hbox{mm}^2\)</EquationSource> </InlineEquation> is fabricated and measured. The measured results demonstrate a significant coverage enhancement of up to 35 dB, for the Ku band, N257, and N260 millimeter wave (mm-wave) 5G bands. The proposed design is useful to enhance 5G mm-wave communication by tackling the fading effects or the presence of obstacles.</p>

Highly compact dual-band frequency selective surface for path-loss and coverage improvement in millimeter-wave advanced wireless applications

期刊论文
出版模式：

开放获取
发表日期：

2025年2月27日

查看全文

Shahid Khan,
Bilal Tariq Malik,
Slawomir Koziel

摘要

In this work, a compact dual-band frequency selective surface (FSS) for path-loss and coverage improvement in advanced wireless communication is showcased. The proposed FSS is a single-layer design with stable and high performance at both 24 GHz and 38 GHz operating frequencies, respectively. The design is highly compact with two wide-band reflection coefficient responses having 49.5% (14.5–26.4 GHz) and 66.57% (35.8–39.8 GHz) bandwidth respectively. To the best of the author’s knowledge, the proposed structure is the most compact design reported thus far with \(0.14\lambda _0 \times 0.14\lambda _0\) electrical length at the lower cutoff frequency. With the proposed design architecture, it is easy to reconfigure the FSS. The small size of \(2.95 \times 2.95\,\hbox{mm}^2\) enables effective operation in different communication environments. For coverage improvement and experimental validation, a \(32 \times 32\) element array of the total footprint of \(96 \times 96\,\hbox{mm}^2\) is fabricated and measured. The measured results demonstrate a significant coverage enhancement of up to 35 dB, for the Ku band, N257, and N260 millimeter wave (mm-wave) 5G bands. The proposed design is useful to enhance 5G mm-wave communication by tackling the fading effects or the presence of obstacles.