Open AccessA novel tunable frequency selective surface absorber with dual-DOF for broadband applications
Author(s) -
Peng Kong,
Xiaowei Yu,
Zhengyang Liu,
Kai Zhou,
Yun He,
Miao Liu,
Jianjun Jiang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.030217
Subject(s) - broadband , optics , resonator , wideband , resistor , materials science , tunable metamaterials , variable capacitor , capacitor , biasing , optoelectronics , voltage , physics , metamaterial , quantum mechanics
A novel tunable frequency selective surface (FSS) with dual-degrees of freedom (DOF) is presented, and firstly applied to broadband absorber. Based on a simple prototype unit cell resonator, an approach for achieving multi-resonances is studied. A unit cell pattern with gradient edges is discussed, and variable resistor and variable capacitor are introduced to fully utilize its characteristic of multi-resonances. Bias line is designed to provide bias voltage respectively for two variable devices and provide two operational DOF for FSS. Simulation and measurement results both show that the tunable FSS absorber with dual-DOF has wideband absorption with the reflectivity below -10 dB in 1-5 GHz and with a total thickness of about 10 mm.