Compact eight-shaped ISM-I band wearable antenna for wireless body area network applications

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Frequenz Pub Date : 2023-07-25 DOI:10.1515/freq-2023-0006

A. Utsav, R. K. Badhai

引用次数: 0

Abstract

Abstract The design and analysis of the electrically small eight-shaped wearable antenna for both on- and off-body communication is proposed in this paper. An eight-shaped radiating structure is placed over the jeans substrate and an I-shaped slot is introduced in the ground plane which makes the antenna resonates at the ISM-I band (2.4 GHz). The antenna has a compact size of 0.30λ0 × 0.20λ0 × 0.001λ0, where λ0 is the free space wavelength at the resonance frequency. The impedance bandwidth (≤−10 dB) of the antenna is 6.1 % and 5.8 % in free space and presence of a human body phantom respectively. The antenna design exhibits good gain along with an improved omnidirectional radiation pattern. The specific absorption rate (SAR) of the antenna averaged over 1 g of tissue is 0.21 W/kg at 2.45 GHz which is far below the FCC standard. The paper also discusses the bending analysis and the fundamental size limitations of the small antenna, concluding that it is suitable for practical use. The simulated results of the prototype are validated by the measured results.

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紧凑型八形ISM-I波段可穿戴天线，适用于无线体域网络应用

摘要:本文提出了一种用于体内外通信的电小型八形可穿戴天线的设计与分析。在牛仔基板上放置8形辐射结构，并在接地面上引入i形槽，使天线在ISM-I波段(2.4 GHz)谐振。天线尺寸紧凑，为0.30λ0 × 0.20λ0 × 0.001λ0，其中λ0为谐振频率下的自由空间波长。在自由空间和人体幻象存在时，天线的阻抗带宽(≤- 10 dB)分别为6.1 %和5.8 %。该天线设计具有良好的增益和改进的全向辐射方向图。在2.45 GHz频段，天线在1 g组织上的平均比吸收率(SAR)为0.21 W/kg，远低于FCC标准。本文还讨论了小型天线的弯曲分析和基本尺寸限制，认为小型天线适合实际应用。样机的仿真结果与实测结果相吻合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.