title: Polarization-independent wide-angle triple-band metamaterial absorber.
abstract: We report the design, fabrication, and measurement of a microwave triple-band absorber. The compact single unit cell consists of three nested electric closed-ring resonators and a metallic ground plane separated by a dielectric layer. Simulation and experimental results show that the absorber has three distinctive absorption peaks at frequencies 4.06 GHz, 6.73 GHz, and 9.22 GHz with the absorption rates of 0.99, 0.93, and 0.95, respectively. The absorber is valid to a wide range of incident angles for both transverse electric (TE) and transverse magnetic (TM) polarizations. The triple-band absorber is a promising candidate as absorbing elements in scientific and technical applications because of its multiband absorption, polarization insensitivity, and wide-angle response.
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Shen
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui
authors.forename: Junming
authors.initials: J
authors.lastname: Zhao
authors.forename: Hui Feng
authors.initials: HF
authors.lastname: Ma
authors.forename: Wei Xiang
authors.initials: WX
authors.lastname: Jiang
authors.forename: Hui
authors.initials: H
authors.lastname: Li