▎ 摘　　要

NOVELTY - The filter has media board, rectangular resonant ring (11) and a microstrip line (12) placed on the upper surface of the dielectric plate. A metal patch is placed on the lower surface of the medium plate. The four resonant corners of the rectangular resonant ring are provided with grooves. A pair of inverted L-shaped microstrip lines is symmetrically arranged on both sides of the rectangular resonant ring. An input port (18) is formed on the lateral outer end of the left microstrip line. The metal patch covers the lower surface of the dielectric plate. USE - Graphene-based bandwidth tunable filter used in communication system. ADVANTAGE - The filter utilizes the excellent electro-optical effect of graphene to realize that the bandwidth of the filter can be dynamically adjusted. DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic diagram of the upper surface of the dielectric board of the graphene-based bandwidth tunable filter. Rectangular resonant ring (11) Microstrip line (12) Graphene sheet (16) Input port (18) Output port (19)