Metamaterial superstrate-loaded meandered microstrip-based radiating structure for bandwidth enhancement

Abstract

We have introduced metamaterial superstrate in microstrip-based radiating structure to increase its bandwidth. Split ring resonators are added as metamaterial metallic inclusion in superstrate of the conventional design. This changes the basic structure of the material. Material properties such as permittivity and permeability changed due to change in the structure. The change in its material properties enhances the bandwidth of the antenna. The antenna is meandered to achieve better performance at the edges which in a way improve the radiation path of the patch. Here, the proposed antenna works on three bands in the range 3–8 GHz. Maximum 60% bandwidth is enhanced in the third band. The voltage standing wave ratio and return loss (S₁₁) of the entire three bands are shown in the paper. The antenna works on 3.51, 4.86 and 7.8 GHz. Design results are obtained by high-frequency structure simulator which is used for simulating microwave passive components.

Keywords:

• metamaterial
• superstrate
• meandered
• split-ring resonator (SRR)
• radiating structure
• bandwidth