A Novel Absorber With Tunable Bandwidth Based on Graphene

Author

Bingzheng Xu ; Changqing Gu ; Zhuo Li ; Liangliang Liu ; Zhenyi Niu

Author_Institution

Key Lab. of Radar Imaging & Microwave Photonics, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

13

fYear

2014

fDate

2014

Firstpage

822

Lastpage

825

Abstract

A design of absorber using two-dimensional (2-D) periodic arrays of double-square split loops and resistive strips printed on grounded dielectric substrate is investigated in this letter. Unlike the traditional structure, graphene sheets are proposed for thin absorbing structures at microwave frequencies. The analysis of absorption properties is based on the dynamic model of graphene, which takes into account the surface impedance of graphene layer. Both narrowband and broadband tunable absorbers can be demonstrated with the same structure by tuning the conductivity of graphene. Furthermore, the equivalent circuit method (ECM) is used to introduce the working principles of the proposed absorber. In addition, the absorber shows relatively stable performance with different oblique incidence angles.

Keywords

equivalent circuits; graphene; radar absorbing materials; surface impedance; 2D periodic arrays; ECM; absorption properties; broadband tunable absorbers; double-square split loops; dynamic model; equivalent circuit method; graphene sheets; grounded dielectric substrate; microwave frequencies; narrowband tunable absorbers; oblique incidence angles; resistive strips; surface impedance; tunable bandwidth; Absorption; Chemicals; Conductivity; Graphene; Impedance; Microwave circuits; Surface impedance; Absorber; equivalent circuit method (ECM); graphene;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2319083

Filename

6803039