文章基本信息

标题：Highly Directional Microstrip Ultra Wide Band Antenna for Microwave Imaging System
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作者：Vanaja Selvaraj ; Poonguzhali Srinivasan ; Jegadish Kumar.K.J 等
期刊名称：Acta Graphica
印刷版ISSN：0353-4707
电子版ISSN：1848-3828
出版年度：2017
卷号：28
期号：1
页码：35-40
DOI：10.25027/agj2017.28.v28i1.122
语种：English
出版社：University of Zagreb, Faculty of Graphic Arts
摘要：This paper presents a novel highly directive ultra-wide band antenna for using in microwave imaging systems.Defected Ground Structure (DGS) is incorporated in the top and side of the ground plane to enhance the bandwidth impedance matching.Subsequently,for the further improvement in the bandwidth,gain and directivity staircase slot and square slot is etched at the bottom and top edge of the square patch plane.The low-frequency performance of the proposed antenna can be achieved by adjusting the gap between the ground and patch plane.The proposed microstrip antenna is fabricated on a Flame Retardant (FR4) plate of laminate substrate with dielectric constant of 4.3.The result shows that a directivity of 2.2-8.4dBi is achieved across a bandwidth from 1.43-8.92GHz.Furthermore,gain,directivity,radiation pattern characteristic and reflection coefficient have also been analyzed at the different resonant frequency.
关键词：Microstrip antenna;microwave imaging systems;ultra-wideband.