Analisa Atenuasi Pada Pipa Plastik dengan Kawat Logam Sebagai Terahertz Waveguide Menggunakan Metode Finite Difference

Abstract

We demonstrate simulation a terahertz waveguide by finite difference method of a hollow core THz waveguide made by dielectric materials with two embedded metal wires. The waveguide is designed with a core diameter of 3 mm which surrounded by 12 small holes with 0.35 mm of the diameter, as well as the diameter embedded of the copper wire with perpendicular and parallel to the electric field. The numerical investigation is conducted by finite difference method by running a simulation using 2D mode solver program to obtain the physical properties of the waveguide. This simulation also determines the attenuation coefficient of the waveguide. The two metal wires embedded perpendicular to the electric field are able to reduce the attenuation down to 6,18% in the frequency range of 0.3 - 1 THz. In the other hand, parallel position increases the attenuation up to 19,07%.