Open AccessDual band metamaterial absorber in microwave regime
Author(s) -
Xiaopeng Shen,
Tie Jun Cui,
Jianxiang Ye
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
ISSN - 1000-3290
DOI - 10.7498/aps.61.058101
Subject(s) - metamaterial absorber , microwave , molar absorptivity , materials science , optics , ground plane , polarization (electrochemistry) , transverse plane , multi band device , absorption (acoustics) , metamaterial , resonator , brewster's angle , optoelectronics , physics , tunable metamaterials , telecommunications , quantum mechanics , computer science , antenna (radio) , chemistry , structural engineering , brewster , engineering
We report on the design, the fabrication and the measurement of a microwave dual band absorber in microwave regime. The single unit cell consists of two closed ring resonators and a metallic ground plane separated by an FR4 layer. Experimental results show that the absorber has two distinctive absorption peaks at frequencies 4.06 GHz and 6.66 GHz with absorptions 99.60% and 95.83%, respectively, and the absorptivity drops in a wide range of incident angle. Fourfold rotational symmetry of the geometry makes the absorber insensitive to transverse electric and transverse magnetic polarization. The dual band absorber is a promising candidate as absorbing elements in multi-frequency imaging and thermal detection, due to its multi-band absorption performance, polarization-insensitivity, and wide angle of incidence.