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Filtering Power Divider With Tunable Attenuation Based on Graphene Nanoplates

A compact filtering power divider with tunable attenuation (FPDA) based on graphene nanoplates is proposed in this letter. The FPDA based on graphene nanoplates consists of three parts: the multimode resonant structure provides the field concentration and filter function, the divider structure generates the power distribution, and the graphene nanoplates loaded next to the resonator are responsible for the controllable adjustment of the concentrated electric field. Depending on the good cooperation of graphene and the filtering power divider, a novel FPDA with controllable attenuation is obtained. The measured results show that the tunable range can be tuned from −3 to −11 dB with a low reflection below −8 and 21 dB high isolation.