一种用于腕带应用的高性能全纺织可穿戴天线。

A High Performance All-Textile Wearable Antenna for Wristband Application.

作者信息

Ejaz Asma, Jabeen Iqra, Khan Zia Ullah, Alomainy Akram, Aljaloud Khaled, Alqahtani Ali H, Hussain Niamat, Hussain Rifaqat, Amin Yasar

机构信息

ACTSENA Research Group, Department of Telecommunication Engineering, University of Engineering and Technology, Taxila 47050, Pakistan.

Antenna and Electromagnetics Research Group, School of Electronic Engineering and Computer Science, Queen Mary University of London, London SE1 9DE, UK.

出版信息

Micromachines (Basel). 2023 May 31;14(6):1169. doi: 10.3390/mi14061169.

DOI:10.3390/mi14061169

PMID:37374754

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10302039/

Abstract

A compact, conformal, all-textile wearable antenna is proposed in this paper for the 2.45 GHz ISM (Industrial, Scientific and Medical) band. The integrated design consists of a monopole radiator backed by a 2 × 1 Electromagnetic Band Gap (EBG) array, resulting in a small form factor suitable for wristband applications. An EBG unit cell is optimized to work in the desired operating band, the results of which are further explored to achieve bandwidth maximization via floating EBG ground. A monopole radiator is made to work in association with the EBG layer to produce the resonance in the ISM band with plausible radiation characteristics. The fabricated design is tested for free space performance analysis and subjected to human body loading. The proposed antenna design achieves bandwidth of 2.39 GHz to 2.54 GHz with a compact footprint of 35.4 × 82.4 mm. The experimental investigations reveal that the reported design adequately retains its performance while operating in close proximity to human beings. The presented Specific Absorption Rate (SAR) analysis reveals 0.297 W/kg calculated at 0.5 W input power, which certifies that the proposed antenna is safe for use in wearable devices.

摘要

本文提出了一种用于2.45 GHz工业、科学和医疗（ISM）频段的紧凑、共形全纺织可穿戴天线。该集成设计由一个单极辐射器和一个2×1电磁带隙（EBG）阵列组成，EBG阵列作为背衬，从而形成适合腕带应用的小尺寸外形。对一个EBG单元进行优化，使其在期望的工作频段内工作，并进一步探索通过浮动EBG接地来实现带宽最大化的结果。使单极辐射器与EBG层协同工作，以在ISM频段产生具有合理辐射特性的共振。对制作的设计进行自由空间性能分析测试，并施加人体负载。所提出的天线设计在35.4×82.4 mm的紧凑尺寸下实现了2.39 GHz至2.54 GHz的带宽。实验研究表明，所报道的设计在靠近人体操作时能充分保持其性能。给出的比吸收率（SAR）分析显示，在0.5 W输入功率下计算得出的SAR为0.297 W/kg，这证明所提出的天线在可穿戴设备中使用是安全的。