Performance analysis of dynamically controllable terahertz grounded coplanar waveguide attenuator based on graphene using wave concept iterative process method

摘要

In this paper, an efficient wave concept iterative process algorithm is proposedto analyze a dynamically controllable grounded coplanar waveguide attenuatorbased on graphene at terahertz frequencies. The proposed modeling techniqueof graphene is based on waves concept, that is based on redefining the boundaryconditions (surface current and electric field) in terms of incident andreflected waves. The developed algorithm integrates both the interband andintraband conductivities without involving volumetric discretization. Therefore,it consumes less simulation time and computational resources. Numericalstudies are conducted to validate the accuracy, speed, and usefulness of theproposed technique. Simulation results demonstrate that the interband term ofthe graphene conductivity has a significant effect and cannot be neglected inthe simulation. The performance of the attenuator can be improved by controllingthe chemical potential of graphene, which can achieve an attenuationrange from 0.29 to 13.2 dB.