Highly Directional Microstrip Ultra Wide Band Antenna for Microwave Imaging System

Acta Graphica

Srinivasan, Poonguzhali¹  Krishnan, Rahul²  Annamalai, Karunakaran²  Selvaraj, Vanaja²  Kumar, Jegadish³ 

[1] Anna University, Chennai;Rajalakshmi Institute of Technology, Chennai, India;SSN College of Engineering, India

关键词: Microstrip antenna;    microwave imaging systems;    ultra-wideband.;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Acta Graphica Publishers

【 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.

【 授权许可】

CC BY-ND