Log Periodic Implementation of Butterfly Shaped Patch Antenna with Gain Enhancement Technique for X-Band Applications

Abstract

The log periodic implementation of butterfly shaped patch antenna has been proposed to operate under the X-band (i.e. 8 GHz to 12 GHz) which have a wide range of applications in the field of civil and military. The periodic metamaterial structures have been implemented to this log periodic patch antenna in order to amplify the gain as it has negative permittivity and permeability. The antenna has been designed by taking the substrate FR4-epoxy with relatively permittivity as 4.4. The dimensions of the ground plane and the substrate are taken as (380 mm × 138 mm × 1.6 mm). This paper presents the comparisons of gain, S11 – parameter, VSWR, radiation efficiency between the log periodic butterfly patch antenna with and without the implementation of metamaterial. The gain enhancement of the log periodic butterfly structured patch antenna has been analyzed with the application of negative indexed metamaterial and also the applications of the proposed antenna in the X-band range have been presented.