Analysis of Metasurface Unit Cell Geometry on Wideband THz Antenna Design
Nipun Sharma, Amrit Kaur
Abstract
The future generation communication systems demand high communication, internet speed and bandwidth networks which has resulted in increased research thrust in THz application and communication. These THz applications and communications require designing state of the art antenna designs. Metasurfaces (MTS) and metamaterials assist in design of THz antennas. The extensive literature review suggests that some research gap is there in the specification stage of antenna design. The existing antenna designs lack design flow diagrams and operate on relatively low bandwidths with fewer resonant frequencies. In this research paper, a focus on the developmental progress of metasurface antennas is discussed and this paper explores the effect of shape of metasurface unit cell structure on the operational bandwidth of the antennas operating in the THz range. The performance of the metasurface based antennas is evaluated and compared. In the first case the unit cell structure is made up of square geometry and in the second case a triangular shaped unit cell structure is used to create an array of metasurface layer over the slotted patch antenna. The improved performance of triangular shaped unit cell array over square shaped unit cell structure and the results are presented in a novel and comparably comprehensible manner. The results cover the research gap of design flow diagrams and proposes a design of THz antenna with a bandwidth of nearly 8 THz with 6 resonant frequencies.