Highly Directional Microstrip Ultra Wide Band Antenna for Microwave Imaging System

  • Vanaja Selvaraj Rajalakshmi Institute of Technology, Chennai, India
  • Poonguzhali Srinivasan Anna University, Chennai
  • Jegadish Kumar SSN College of Engineering, India
  • Rahul Krishnan Rajalakshmi Institute of Technology, Chennai, India
  • Karunakaran Annamalai Rajalakshmi Institute of Technology, Chennai, India

Abstract

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.

Published
Jul 20, 2017
How to Cite
SELVARAJ, Vanaja et al. Highly Directional Microstrip Ultra Wide Band Antenna for Microwave Imaging System. Acta Graphica, [S.l.], v. 28, n. 1, p. 35-40, july 2017. ISSN 1848-3828. Available at: <http://actagraphica.hr/index.php/actagraphica/article/view/122>. Date accessed: 17 aug. 2017.
Section
Original Scientific Papers