SIW-based Network Antenna Design and Analysis

Abstract

This work is concerned with the design of an antenna array using SIW technology, where the basic element is a rectangular patch antenna. The main goal is to improve the radiation pattern. This technology allows this type of antenna to be produced at a lower cost and easily integrated into communications systems. The antenna was designed in the HFSS simulator on a FR-4 Epoxy substrate with a dielectric constant of ε<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</inf>=4.4 and a thickness of 1.6mm. Three structures have been proposed: the array antenna (AR2), the array antenna (AR4), and the SIW array antenna (SAR4). This paper proposes to insert metal vias between the four elements of the AR4 antenna to direct the antenna radiation towards the main lobe. The antenna resonates at two different frequencies: 6.1 GHz with a matching coefficient S<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf>=17.77 dB and 6.85 GHz with a matching coefficient S<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf>=16.63dB.