▎ 摘　　要

NOVELTY - The device has a periodic hole arrangement provided with a disk of concentric graphene and connected with bridges (104). The disk is operated in hertz range, which reaches a region of frequencies not exploited by photonic devices and plasmids current. A cell is provided with a graphene plate (102), which is inserted into a disk (103) through a circular hole. The disk and the graphene plate are connected with the bridges. A central disk (105) is formed with an aperture and positioned on sides of a dielectric substrate. USE - Multi-functional planar device for use as a electromagnetic filter and an electromagnetic switch (all claimed), of an electromagnetic system and a digital communication system. ADVANTAGE - The device realizes dynamic control of a transparency window filter by changing chemical potential of grapheme, increases value of the chemical potential of the grapheme and improves high frequency transmission when parameter value is decreased. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a multi-functional planar device. Cell device (101) Graphene plate (102) Concentric graphene disk (103) Bridges (104) Central disk (105)