Gain and Bandwidth Considerations for Microstrip Patch Antenna Employing U and Quad L shaped Slots with DGS and Parasitic Elements for WiMax / WiFi Applications

M Kshetra Sree,P R S Naga Surya,B T V Madhan,G Viswanadh Raviteja,N Avinash

doi:10.24018/ejers.2020.5.3.1834

M Kshetra Sree, P R S Naga Surya + Show 3 more

Open Access

https://doi.org/10.24018/ejers.2020.5.3.1834

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Abstract

In this research article, a microstrip patch antenna for Wireless Applications is presented. Stage by stage, the antenna is modified to achieve the desired wideband characteristics. The final proposed antenna is a combination of U and Quad L shaped slots with L shaped DGS and U shaped dual parasitic elements. Parameters S11, bandwidth and gain of the antenna versions during each stage are noted and steps are taken to improve these parameters. The end result is a wideband microstrip patch antenna working in the frequency range of 4.75 GHz to 6.15 GHz with a bandwidth of 1.40 GHz. The peak gain observed is about 7.24 dB at 5.64 GHz frequency. Simulations are carried out using HFSS software. The obtained results show that the proposed antenna can be extensively for WiFi (4.9 GHz to 5.9 GHz) and WiMax (5.3 GHz to 5.8 GHz) Applications.

Highlights

Increased demand is shown towards multiband operated antennas in the present day trends of the wireless systems
Defected ground structure (DGS) in microstrip antennas is frequently used as a strategy to reduce the size, reducing unwanted harmonics, improving the bandwidth, reducing the effects of mutual coupling in case of an array
A conventional antenna is designed to operate at 5 GHz frequency

Summary

INTRODUCTION

Increased demand is shown towards multiband operated antennas in the present day trends of the wireless systems. The MPAs are used in many applications These antennas have many good features such as less weight, ease of manufacturing, low cost, and low profile. With the use of a split ring slotted patch, the size of the antenna is noted to be reduced and bandwidth is said to be sufficiently improved [4,5,6]. Defected ground structure (DGS) in microstrip antennas is frequently used as a strategy to reduce the size, reducing unwanted harmonics, improving the bandwidth, reducing the effects of mutual coupling in case of an array. For a single antenna, dual-band frequencies with improved wideband characteristics can be obtained when compared to a normal conventional patch antenna.

Stage One – Conventional design

Stage two – Inclusion of double U slot parasitic elements and U Shaped Slot

Stage three – Proposed inclusion of L shaped DGS and Quad L – shaped Slots

CONCLUSION