Planar electromagnetic band-gap structure based on graphene

• Analysing GEBG characteristic with equivalent circuit.
• Dynamically adjusting the electromagnetic wave propagation in ribbon arrays GEBG.
• Resonance characteristic can be dynamic adjustment in concentric rings GEBG.
• Spurious passband can be efficient suppression in spiral-GEBG.

Electromagnetic band-gap structure with slow-wave effect is instrumental in effectively controlling electromagnetic wave propagation. In this paper, we theoretically analyze equivalent circuit model of electromagnetic band-gap structure based on graphene and evaluate its potential applications. Graphene electromagnetic band-gap based on parallel planar waveguide is investigated, which display good characteristics in dynamically adjusting the electromagnetic wave propagation in terahertz range. The same characteristics are retrieved in a spiral shape electromagnetic band-gap based on coplanar waveguide due to tunable conductivity of graphene. Various potential terahertz planar devices are expected to derive from the prototype structures.