Impact assessment of bias network topology on the performance of electrothermally reconfigurable metamaterials

The behavior of optimally-designed electrothermally controlled complex materials, when implemented with different bias network setups, is investigated in this paper. The proposed devices obtained from the combination of two-hot-arm electrothermal actuators with a split-ring resonator (SRR) can be actuated by employing two discrete topologies of the bias lines. These components exhibit mu-negative (MNG) performance, as well as double-negative (DNG) behavior, along with bandwidth tunability. Various numerical results, derived via the finite element method (FEM), validate their modified response.