Dynamically Tunable Multifunction Attenuator Based on Graphene-Integrated Dual-Mode Microstrip Resonators

In this paper, a method for the design of tunable multifunctional attenuators is proposed by analyzing the characterization of dual-mode microstrip resonators loaded by a graphene-sandwiched structure (GSS). Firstly, the odd–even mode method is applied to analyze the resonance characteristics of two common GSS-loaded dual-mode resonators, which clearly describe the influence of graphene on these resonators. Then, two kinds of multifunctional attenuator with dynamically tunable attenuation are proposed based on graphene-integrated dual-mode resonators, which enables controllable characteristics and multi-frequency transmission options for traditional attenuating devices. Finally, all the proposed multifunctional attenuators are fabricated and measured. The experimental results are in good agreement with the simulation results, which further verifies the conclusions and design method proposed in this paper.