Bandwidth Enhancement of Microstrip Patch Antenna Using Metasurface

Felipe Ferreira De Araújo,Alfredo Gomes Neto,Antonio Luiz Pereira De Siqueira Campos,Adaildo Gomes D'Assunção,Ruann Victor De Andrade Lira

doi:10.1590/2179-10742021v20i1959

Felipe Ferreira De Araújo, Alfredo Gomes Neto + Show 3 more

Open Access

https://doi.org/10.1590/2179-10742021v20i1959

Copy DOI

Abstract

Abstract In this article, bandwidth enhancement of a microstrip patch antenna using a new kind of metasurface is discussed. This new geometry is used to generate new resonances in antenna and with an optimal position of the metasurface in relation to antenna we can overlap the resonances and obtain a large bandwidth. The proposed antenna showed a bandwidth from 5.1 GHz to 8.0 GHz what can it able to be applied in WiFi 5 and 6. Numerical results were obtained with Ansys HFSS software. A prototype was built and measurements for S11, Smith chart and gain were performed. Numerical and experimental results are in good agreement.

Highlights

Microstrip antennas are being widely used in wireless communications due to their low profile, weight and manufacturing cost [1], [2]
The results of the studies show that the metasurface characteristics and the unit cell pattern change the antenna impedance resulting in the overlapping of the new resonant frequencies, which allow a measured fractional bandwidth of 45.4 % (5.1 – 8.0 GHz)
We propose the use of a circular metasurface coupled to a patch antenna to increase bandwidth

Summary

INTRODUCTION

Microstrip antennas are being widely used in wireless communications due to their low profile, weight and manufacturing cost [1], [2] These antennas can be integrated into electronic circuits. The technique of increasing losses is not recommended when power is limited, as it is the case with portable or mobile communications equipment, as this may reduce their radiation efficiency Another alternative is increase the substrate thickness or multi-layers’ structures [6]. In many applications, such as cell phones, the space available for antenna accommodation is limited, which restricts the volume occupied by the antenna Another approach involves the coupling of electromagnetic band-gap (EBG) structures to the patch. The results of the studies show that the metasurface characteristics and the unit cell pattern change the antenna impedance resulting in the overlapping of the new resonant frequencies, which allow a measured fractional bandwidth of 45.4 % (5.1 – 8.0 GHz)

PREVIOUS WORKS

PROPOSED PATCH ANTENNA AND METASURFACE

PARAMETRIC ANALYSIS

NUMERICAL AND EXPERIMENTAL RESULTS

Findings

CONCLUSIONS