Flexible novel trident shaped microstrip patch antennas design employing Teflon substrate

Abstract

This paper exhibits the aptness of flexible Teflon material having dielectric constant £r=2.1 to be employed as substrate in the Microstrip patch antenna design. This paper presents two flexible Teflon substrates of thickness 0.5 mm and 1 mm, respectively. The antenna designs employ a Trident shaped copper patch on the top surface of dielectric Teflon substrate and a defected ground plane on the other side of substrate. In this paper, substrate and structure materials employed in the antenna designs have been retained identical, whereas the dimensions of antenna designs are distinctive. In this paper, the thickness of the substrate is varied and the effect on the bandwidth, directivity and gain of antennas are investigated. A thorough parametric analysis has been performed and it has been perceived that the gain and directivity of antenna increases by decreasing the thickness of substrate. It has been also witnessed that the resonant frequency of the designed antenna, shifts to lower frequency by employing thick dielectric substrate. The performance of Microstrip patch antenna has been compared in terms of directivity(dBi), gain(dB), return loss(dB), impedance bandwidth(GHz) and half power beam width(degrees). The antenna has been designed in CST Microwave Studio 2014 and has been fabricated and verified using E5071C Network Analyzer and anechoic chamber.