Metasurface based microstrip patch antenna at 11GHz frequency for enhanced gain and directivity

Abstract

This paper presents a metamaterial based microstrip patch antenna with fractal geometry and defected ground to give improved Return loss, Directivity, Gain and Bandwidth.Two rectangular shapes have been cut from two edges of the ground.RT 5880LZ dielectric has been used as substrate along with a Meta-surface (MS) layer separated by air gap. The MS unit cell consists of two L-shaped patches on two corners and a C-shaped patch at the centre.Fractal Patch with rectangular notches on three sides has been used along with microstrip feedline to feed the antenna.This antenna gives a good impedance matching in the frequency range of 10.6 GHz - 11.3 GHz.Maximum return loss of 21.31 dB has been achieved and a gain of 6 dBi has been obtained at the operating frequency of 10.95 GHz. This efficient antenna model can be implemented for satellite communication in X-band.