Ultra-Wideband Circular Microstrip Antenna with Hybrid EBG for reduced SAR

IF 0.8 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Advanced Electromagnetics Pub Date : 2022-04-03 DOI:10.7716/aem.v11i1.1688

M. Munde, A. Nandgaonkar, S. Deosarkar

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引用次数: 1

Abstract

This article presents a basic ultra-wideband circular microstrip antenna (UWB-CMSA) with partial ground resonating from 2.38 GHz to 12 GHz for handheld devices. The designed antenna covers bands for Bluetooth (2.4 GHz), LTE (2.5/2.69 GHz), WLAN (2.4/3.5/5 GHz), and WiMAX (2.5/3.5/5.5) GHz applications. Specific Absorption Rate (SAR) values of certain bands exceed a limit for UWB-CMSA. The uniplanar spiral unit cell is designed and exhibits phase reversal for 2.4 GHz, 3.5 GHz, and 5.5 GHz. EBG unit cells are placed near the feed for surface wave minimization so as to achieve a reduction in SAR. Furthermore, the EBG structure is placed on the ground plane to analyze the impact, also designs are fabricated and results are compared. Mushroom type M-shaped unit cell is designed which offers phase reversal at 2.3 GHz which is placed near feed in a similar fashion to the earlier spiral one to suppress surface waves also the structure is investigated by arranging it on the ground plane. It is evident that SAR is reduced for all the cases being inspected but for certain bands it exceeds the limit of 1.6 W/kg. A combination of two different unit cells to form a hybrid EBG structure is proposed and evaluated by placing it near the feed. SAR is curtailed by 87.05% at 5.5 GHz.

查看原文本刊更多论文

用于缩减SAR的混合EBG超宽带圆形微带天线

本文提出了一种适用于手持设备的基本超宽带圆形微带天线（UWB-CMSA），其部分地谐振频率为2.38 GHz至12 GHz。设计的天线覆盖蓝牙（2.4 GHz）、LTE（2.5/2.69 GHz）、WLAN（2.4/3.5/5 GHz）和WiMAX（2.5/3.5/5.5）GHz应用的频段。某些波段的比吸收率（SAR）值超过了UWB-CMSA的极限。设计了单平面螺旋晶胞，并在2.4GHz、3.5GHz和5.5GHz下表现出相位反转。EBG单元被放置在馈线附近，用于表面波最小化，从而实现SAR的降低。此外，将EBG结构放置在地平面上以分析冲击，还制作了设计并对结果进行了比较。蘑菇型M形晶胞被设计为在2.3GHz下提供相位反转，该晶胞以类似于早期螺旋晶胞的方式放置在馈电附近以抑制表面波，并且通过将其布置在地平面上来研究该结构。很明显，对于所有被检查的情况，SAR都有所降低，但对于某些波段，SAR超过了1.6 W/kg的限制。提出了两种不同晶胞的组合以形成混合EBG结构，并通过将其放置在进料附近进行评估。SAR在5.5 GHz时缩减了87.05%。

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.