Comparison of antenna parameters for different substrate materials at terahertz frequency region

Abstract

Terahertz band communication is considered to be one of the most potential aspects of networks beyond 5G. However, it has been observed that antennas designed for this region still have very high losses. Dielectric substrate plays a key role in determining the antenna parameters like Sparameter, VSWR, 3D radiation pattern, directivity and gain. This paper provides a comprehensive solid background of the previous research works done on microstrip patch antenna in the terahertz region. Furthermore, a design for circular microstrip patch antenna consisting of a copper patch primarily focused on terahertz band communication has also been proposed. Simulation of the proposed antenna is carried out using an electromagnetic field solver software called Computer Simulation Technology (CST). The antenna's performance based on different types of substrates such as Polyimide, Teflon, Quartz and Silicon Dioxide is analyzed between frequencies ranging between 1.5 to 1.7 terahertz (THz). The minimum return loss achieved for the fore mentioned resonant frequency range is-22.336dB for Teflon and the corresponding gain is 4.71 dB, which represents the optimum results among the four substrates.