检索结果-南通市图书馆

Directional Wideband wearable Antenna with Circular Parasitic Element for Microwave Imaging Applications

Computers, Materials & Continua 2022年第7期72卷 983-998页

作者： N.A.Koma’rudin Z.Zakaria A.A.Althuwayb H.Lago H.Alsariera H.Nornikman A.J.A.Al-Gburi P.J.Soh Faculty of Electronic and Computer Engineering(FKEKK) Universiti Teknikal Malaysia Melaka(UTeM)Durian Tunggal76100MelakaMalaysia Electrical Engineering Department Jouf UniversitySakaka72388AljoufKingdom of Saudi Arabia Faculty of Engineering Universiti Malaysia Sabah(UMS)Kota Kinabalu88400SabahMalaysia Centre for Wireless Communications(CWC) University of OuluOulu90014Finland Advanced Communication Engineering(ACE)CoE Faculty of Electronic Engineering TechnologyUniversiti Malaysia Perlis(UniMAP)Arau02600PerlisMalaysia

This work proposes a wideband and unidirectional antenna consisting of dual layer of coplanar waveguide based on the circular parasitic element *** design procedure is implemented in three stages:Design A,which operates at 3.94 GHz with a bandwidth of 3.83 GHz and a fractional bandwidth(FBW)of 97.2%;Design B,which operates at 3.98 GHz with a bandwidth of 0.66 GHz(FBW of 56.53%);and Design C as the final *** final Design C is designed to resonate at several frequencies between 2.89 and 7.0 GHz for microwave imaging applications with a bandwidth of 4.11 GHz(79.8%)centered at 5.15 *** antenna is fabricated fully using two textile materials:felt as the substrate and ShieldIt as the *** features a unidirectional radiation with a gain of 5.5 dBi,and reduced lowback radiation from 2.06 to−7.81 *** front-to-back ratio(FBR)for Design A,Design B and Design C are 4.82,2.94 and 11.36 dB,*** antenna is wideband with unidirectional radiation,lightweight,and flexible.

关键词： wearable antennas ultrawideband antennas unidirectional antennas microwave imaging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Left-Handed Characteristics Tunable C-Shaped Varactor Loaded Textile Metamaterial for Microwave Applications

引用

Computers, Materials & Continua 2022年第4期71卷 611-628页

作者： Samir Salem Al-Bawri Mohammad Tariqul Islam Kabir Hossain Thennarasan Sabapathy Muzammil Jusoh Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaUKMBangi43600SelangorMalaysia Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)PerlisMalaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)PerlisMalaysia

This paper presents a textile-based C-shaped split-ring resonators(SRR)metamaterial(MTM)unit cells with an electrical tunability *** proposed MTM was composed of two symmetrical C-shaped SRR combined with a central diagonal metal bar,whereas the RF varactor diode is placed on the backside of the splitted ground *** behavior of single and array MTM unit cells were analyzed while the achieved negative index physical characteristics were widely *** four different MTM arrays(i.e.,1×1,1×2,2×1,and 2×2)were analyzed in simulation,a 2×2-unit cell array was chosen to fabricate,and it was further undergone experimental *** proposed tunable MTM exhibits double negative(DNG)/left-handed properties with an average bandwidth of more than 2.8 ***,attainable negative permittivity and negative permeability are within 2.66 to 9.59 GHz and within 2.77 to 15 GHz,respectively,at the frequency of interest(between 1 and 15 GHz).Moreover,the proposed tunable MTM also showed tunable transmission coefficient *** proposed electrically tunable textile MTM might function in a dynamic mode,making it suitable for a variety of microwave-wearable applications.A satisfactory agreement between simulations and experiments were achieved,demonstrating that the proposed MTM can operate over a wide bandwidth.

关键词： Textile metamaterial metamaterial wearable antennas tunable metamaterials metasurface antennas DNG metamaterials

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

wearable Antenna Measurements in Vicinity of Human Body

引用

Wireless Engineering and Technology 2016年第3期7卷 97-104页

作者： Albert Sabban Electrical Engineering Department Ort Braude College Karmiel Israel

This paper presents measurements techniques of wearable antennas and RF medical systems in vicinity of human body. The antennas radiation characteristics on human body have been measured by using a phantom. The phantom electrical characteristics represent the human body electrical characteristics. The phantom has a cylindrical shape with a 40 cm diameter and a length of 1.5 m. The phantom electrical characteristics are similar to the human body electrical characteristics. The antenna under test was placed on the phantom during the measurements of the antennas radiation characteristics. The phantom was employed to compare the electrical performance of several new wearable antennas. The phantom was also employed to measure the electrical performance of several antenna belts in vicinity of human body. The results of antenna with thinner belt are better than the results of the same antenna array with thicker belt.

关键词： wearable antennas wearable Antenna Measurements Printed antennas Phantom Wireless Communication

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：