A novel flexible ultra-wide band wearable slot antenna with defected ground for WBAN applications

This study introduces the development of a flexible and compact radiator
using a jeans material as a substrate for wireless body area network
(WBAN) applications. A fabric made of jeans with a thickness of 0.6 mm, a
tangent loss (tan δ) of 0.02, and a dielectric constant (εr) of 1.6 is
used for designing an element with dimensions of 18.5×27×0.6 mm3. The
jeans substrate incorporates a triangular feed structure on top and a
defected ground structure (DGS) on its back. This design enables a span
ranging from 3.41 to more than 20 GHz, with a magnitude of S11<-10
dB, a peak gain of 4.48 dBi, and a peak efficiency of 97.28%. The system
is designed for Ultra-wideband (UWB) integrated with Ku band. The
measurement findings are very consistent with the results obtained from
the models. The suggested antenna is highly appropriate for WBAN
applications because to its thin profile, flexible design, and
compatibility with WBAN and UWB technologies..

本研究介绍了一款柔性紧凑型辐射器的研制过程，该辐射器以牛仔布作为基板，适用于无线体域网（Wireless Body Area Network, WBAN）应用场景。研究采用厚度为0.6 mm、损耗正切（tanδ）为0.02、介电常数（εᵣ）为1.6的牛仔织物，设计了尺寸为18.5×27×0.6 mm³的辐射单元。该牛仔布基板正面集成有三角形馈电结构，背面搭载缺陷地结构（Defected Ground Structure, DGS）。此设计可实现3.41 GHz至20 GHz以上的工作带宽，其散射参数S₁₁幅值小于-10 dB，峰值增益达4.48 dBi，峰值辐射效率为97.28%。该系统面向超宽带（Ultra-wideband, UWB）与Ku波段集成应用场景设计，实测结果与仿真模型所得结果高度一致。所提出的天线凭借其轻薄剖面、柔性设计以及与无线体域网和超宽带技术的良好兼容性，十分适用于无线体域网相关应用。