Metamaterial Tunable Filter Design

Metamaterial Tunable Filter Design

This paper presents a new concept to implement a tunable filter metamaterial with dual negative refraction composed of ferrite slabs and metallic resonators, including split-ring resonators (SRR), and short wire pairs. The ferrite slabs under an applied magnetics bias provide one magnetic resonance frequency band and the metallic resonators provide another one. The continuous wires within the m...

Metamaterial-Based Compact Filter Design

Tunable reflecting terahertz filter based on chirped metamaterial structure

Tunable reflecting terahertz bandstop filter based on chirped metamaterial structure is demonstrated by numerical simulation. In the metamaterial, the metal bars are concatenated to silicon bars with different lengths. By varying the conductivity of the silicon bars, the reflectivity, central frequency and bandwidth of the metamaterial could be tuned. Light illumination could be introduced to c...

Tunable Filter Structure – Analysis and Design

A simple filter application of a new efficient hybrid method is presented in this paper. The method combines the discrete finite difference method in frequency domain (FDFD) with analytical mode matching (MM) technique and orthogonal expansion method. The procedure allows for the analysis of electromagnetic wave scattering by cylindrical objects with arbitrary cross-section located within the r...

Liquid crystal tunable metamaterial absorber.

We present an experimental demonstration of electronically tunable metamaterial absorbers in the terahertz regime. By incorporation of active liquid crystal into strategic locations within the metamaterial unit cell, we are able to modify the absorption by 30% at 2.62 THz, as well as tune the resonant absorption over 4% in bandwidth. Numerical full-wave simulations match well to experiments and...