Graphene based Tunable Band stop Filter using T-shape Resonator

In this paper, a narrowband band stop filter with graphene is designed. The filter is designed by using a T-shaped resonator which is coupled to the transmission line. In the filter design, Graphene layers are placed at the metal dielectric interface to support the propagation of surface plasmonic wave’s transmission. The proposed filter has shown good resonant characteristics at 0.88 THz by using Finite Integration technique. By modifying the number of layers of graphene, the center frequency of the proposed bandstop filter is tuned from 0. 88THz to 0. 89THz with constant absolute bandwidth of 50 GHz. From the results it is apparent that the stopband response is obtained with a good attenuation of about -25dB in stopband.