Abstract
A five-band metamaterial absorber (MMA) is presented. The proposed absorber consists of a three-layer structure of the top metal resonator, intermediate dielectric layer, and bottom metal plane. The top structure takes the centroid as the center and spreads out in a three-pronged shape with an average of 360°, and the ends bifurcate again. The calculation was carried out by the professional software to iteratively optimize the absorption effect of MMA in the microwave range. The results show that the MA has five peaks at resonant frequencies of 5.984 GHz, 12.232 GHz, 18.128 GHz, 18.414 GHz, and 20.592 GHz, with peaks of 0.9925, 0.9968, 0.9783, 0.9754, and 0.9975. By analyzing the electromagnetic field and surface current distribution of the absorber, the absorption mechanism is further verified, and the corresponding influence on the absorption spectrum is studied according to different polarization angles and incident angles. The effects of different resonator structure size and dielectric layer thickness on absorption rate were also discussed, and the distribution of electromagnetic fields is analyzed to reveal the existence of electric dipole resonance and magnetic resonance. Through comparing experiments and simulations, it is found that the peaks of the 1st, 2nd, and 5th have smaller absorption errors and frequency deviation, while the peaks of the 3rd and 4th have large ones. The five-band absorber has potential application in multiband electromagnetic stealth, bionic sensor, thermal radiation measuring instrument, and so on.
Highlights
Metamaterials, unlike traditional natural materials, have some special electromagnetic property [1,2,3], such as negative refraction [4, 5], anomalous Cherenkov radiation, and anomalous Doppler effect
Luo and Cheng presented a simple design for an ultrathin dual-band polarization-insensitive and wide-angle perfect metamaterial absorber (PMMA) based on a single circular sector resonator structure (CSRS) [14]; it possesses three resonance peaks with absorption greater than 99% at 6.68 GHz and 15.41 GHz
Is design is a five-band metamaterial absorber with low frequency polarization insensitivity and high frequency sensitivity, which is composed of a top trigeminal metal resonator, an intermediate dielectric layer, and a thin metal plane of the bottom metal. e absorption frequency and effect can be optimized by regulating the structure size and dielectric layer thickness of the resonator
Summary
Metamaterials, unlike traditional natural materials, have some special electromagnetic property [1,2,3], such as negative refraction [4, 5], anomalous Cherenkov radiation, and anomalous Doppler effect. The research scope of MMA absorption spectrum from microwave [9] to terahertz [10, 11] to visible frequency [12] continuously put forward that a single-band [13], multiband [14,15,16], and broad-band [17,18,19,20] absorption performance is the perfect absorber. Cheng et al presented the design, simulation, measurement, and characterization of a seven-band polarization-insensitive and wide-angle metamaterial absorber (MMA) in the microwave frequency region [15]; there exist seven distinctive resonant. Is design is a five-band metamaterial absorber with low frequency polarization insensitivity and high frequency sensitivity, which is composed of a top trigeminal metal resonator, an intermediate dielectric layer, and a thin metal plane of the bottom metal. E absorption frequency and effect can be optimized by regulating the structure size and dielectric layer thickness of the resonator. The absorber thickness of this design is only 2.4% of the microwave operating wavelength. e follow-up work includes the study of the influence of the polarization angle, the size of the resonator, and the thickness of the dielectric layer on the absorption rate and expounds and analyzes the electromagnetic field distribution and surface current distribution
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
