A Compact Circular Polarized MIMO Fabric Antenna with AMC Backing for WBAN Applications

IF 0.8 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Advanced Electromagnetics Pub Date : 2022-08-08 DOI:10.7716/aem.v11i3.1953

T. Pathan, Dr. Bhagwat kakde

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引用次数: 3

Abstract

A compact high-isolation diversity and circular polarized (CP) multiple-input multiple-output (MIMO) fabric antenna for 2.4 GHz ISM band applications is presented. A metamaterial (MTM)-inspired radiating element is used for the miniaturization of the presented fabric antenna. The proposed antenna is fabricated on a denim substrate and has a dimension of 58 mm x 23 mm x 1.6 mm. The circular polarization is achieved by trimming the two diagonal corners of the radiating elements. A defected ground structure (DGS) comprising two U-slots is placed underneath each radiator to increase the bandwidth of the presented antenna. The isolation characteristics between the two antenna elements are increased by 20 dB by cutting a slit in a ground plane. The proposed CP-MIMO antenna incorporates an artificial magnetic conductor (AMC) layer to limit backward radiation towards the human body and hence enhances the gain. This antenna has been created on a denim substrate with permittivity εr =1.6 and 1.6 mm thickness. The proposed antenna offers a fractional bandwidth of 6.6 % (2.38-2.54 GHz), and an impedance bandwidth about 160 MHz. The antenna has a peak gain of 2.5 dBi without AMC and 4.5 dBi with AMC. To validate the simulation results, a prototype for the proposed antenna has been fabricated and experimentally characterized. Due to its small size, low specific absorption rate (SAR), ease of integration, and robustness, this antenna is a good option for wireless body area network (WBAN) applications.

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一种用于WBAN应用的具有AMC支持的紧凑型圆极化MIMO结构天线

提出了一种适用于2.4GHz ISM频带应用的紧凑型高隔离分集圆极化（CP）多输入多输出（MIMO）结构天线。超材料（MTM）启发的辐射元件被用于所提出的织物天线的小型化。所提出的天线是在牛仔布基底上制造的，尺寸为58毫米x 23毫米x 1.6毫米。圆极化是通过修剪辐射元件的两个对角来实现的。包括两个U形槽的缺陷接地结构（DGS）被放置在每个辐射器下方，以增加所提出的天线的带宽。通过在接地平面中切割狭缝，两个天线元件之间的隔离特性增加了20dB。所提出的CP-MIMO天线结合了人工磁导体（AMC）层，以限制朝向人体的反向辐射，从而提高增益。该天线是在介电常数εr=1.6和厚度为1.6 mm的牛仔布衬底上制作的。所提出的天线提供6.6%（2.38-2.54GHz）的部分带宽和大约160MHz的阻抗带宽。天线在没有AMC的情况下具有2.5dBi的峰值增益，在有AMC的条件下具有4.5dBi的峰增益。为了验证仿真结果，已经制作了所提出的天线的原型并对其进行了实验表征。由于其体积小、比吸收率（SAR）低、易于集成和鲁棒性，该天线是无线体域网（WBAN）应用的良好选择。

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

Advanced Electromagnetics ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

2.40

自引率

12.50%

发文量

审稿时长

10 weeks

期刊介绍： Advanced Electromagnetics, is electronic peer-reviewed open access journal that publishes original research articles as well as review articles in all areas of electromagnetic science and engineering. The aim of the journal is to become a premier open access source of high quality research that spans the entire broad field of electromagnetics from classic to quantum electrodynamics.