Microstrip Line Fed Fractal Monopole Antenna with Defected Ground Structure

S S Mohan Reddy,G V S Padma Rao,B Sanjay,K Aruna Kumari,M M Vinod Kumar

doi:10.14419/ijet.v7i3.31.18193

Abstract

This paper presents a wideband polarized antenna that is designed and analyzed for the cellular communication applications. The proposed antenna is designed with the coplanar wave guide feeding (CPW) by using the RT/ duroid 5880 material with a dielectric constant 2.2. It is observed that in the proposed model the return loss is -21.40dB for ungrounded CPW where as for the grounded CPW the loss is reduced to -39.13dB. The gain for the ungrounded CPW fed antenna is 2.95 dB and is enhanced to 3.2dB with grounded CPW structure. It is observed that there is an improvement in the bandwidth upto 6.03 GhZ for grounded CPW when DGS is applied. The antenna designing and simulation is done using ANSOFT HFSS software.

Highlights

In the modern telecommunications systems Microstrip patch antenna has become more popular due to its compact size and simple to fabricate while the other antennas do not have this features [1]
This work mainly emphasizes on designing a circular patch by using coplanar wave guide feeding (CPW) feeding with Defective Ground Structure (DGS) (Defective ground structure)
The material used in the proposed antenna is Rogers RT/duroid 5880 with the dielectric constant is 2.2

Summary

Introduction

In the modern telecommunications systems Microstrip patch antenna has become more popular due to its compact size and simple to fabricate while the other antennas do not have this features [1]. The antenna with CPW feed consists of a substrate with a patch on it, the ground on either sides of the central conductor [2]. The proposed antenna can be effectively usedbetween 3 GHZ to 9.24 GHZ frequencieswhich is a wireless application range. It can cover the WIMAX and LTE42/43 systems[6]. The designed antenna operates in ultra-band with the bandwidth of 6.03 GHZ by applying the Defective Ground Structure (DGS) for the grounded CPW fed antenna. With electromagnetic coupling the power gets transferred from themicrostrip line to the radiating patch using. In the line feeding the feed can be inscribed on the same substrate to provide a planar structure.

ANTENNA DESIGN PARAMETERS

FEEDING TECHNIQUE d

Results and Discussions: dl dw

Conclusion