Theoretical Study of Radiation Efficiency of Terahertz Anisotropic Rectangular Dielectric Resonator Antenna Using Modified Relaxation-Effect Model for Silver Metal

In this article, the radiation efficiency of an anisotropic terahertz dielectric resonator antenna (DRA) is investigated with a theoretical method. The dielectric waveguide method has been used for the theoretical investigation of the antenna. Electric and magnetic fields, radiation patterns and radiation efficiency have been determined for uniaxial anisotropic DRA residing on a lossy ground plane. The Modified Relaxation-Effect model is used to calculate the losses of the silver ground plane. By using the theoretical method, the effect of different terahertz DRA parameters on its radiation efficiency has been investigated. Two different numerical methods, finite integration technique (FIT) and finite element method (FEM), have been used to check the accuracy of the theoretical results. In the simulation, the silver ground plane is considered as a frequency-dependent impedance sheet. A good agreement between the results of simulation and theory is attained.

کلیدواژه ها:

Terahertz (THz) antenna ، theory ، graphene ، triangular dielectric resonator antenna (TDRA)