Graphene-based Rasorber with Wide Transmission Band and Narrow Transitional Band

In this paper, a graphene-based rasorber with a wide transmission band and a narrow transitional band is proposed. The type of the rasorber is TA which means it has an absorption band above the transmission band. Concretely, the transmission band is located in the X band which is ranged from 9.36GHz to 11.8GHz under 1dB insertion loss, the absorption band is located in the Ku band which is ranged from 13.2GHz to 18GHz under −10dB reflection. The absorption band is mainly realized by the top layer of the model, with a graphene ohmic sheet configured Jerusalem cross. To realize the wide transmission band, a second-order bandpass FSS(frequency selective surface) is used as the bottom layer. Through introducing a transmission zero at the upper side of the transmission band of FSS, the transitional band is reduced.