Graphene Waveguide Integrated Switch for High-frequency applications

Important results from the project

We used the tunable conductive properties of graphene to induce a switching effect in waveguides for high frequency applications. A graphene patch was simulated on a gap-waveguide and gated by an external voltage. This electrically tunes the graphene, thereby modulating the ON/OFF waveguide characteristics. The gap waveguide design is scalable in terms of frequency range, can cover the commercial bands (K-W) and could be extended to higher frequencies, should future needs arise.

Expected long term effects

oSupport from literature that all parts of the fabrication are feasible. In particular, the graphene modulation and design parameters are achievable. oSimulation suggests that the switching effect is feasible. oSimulation and experiment suggests that the target specifications are achievable oViable fabrication process has been identified oDesign specifications and constraints are identified. oPotential packaging solutions identified.

Approach and implementation

Literature survey was performed in order to assess feasibility Simulation of waveguide performed in CST Microwave studios to assess feasibility of switching effect Simulation performed in MATLAB to determine graphene tenability Experiments performed on GFET structures to assess tenability Design specifications determined through Gapwaves AB