Dual-Band Binary Metamaterial Absorber Based on Low-Permittivity All-Dielectric Resonance Surface

Abstract

A binary-structured metamaterial absorber (BMA) consisting of a low-permittivity dual-layer all-dielectric resonance surface (ADRS) and reflector was simulated and experimentally validated. Analyses of relative impedance, electric/magnetic field and power loss density indicated that the proposed BMA exhibits two absorption peaks at 14.65 GHz and 16.61 GHz, resulting from the magnetic and electrical responses of ADRS, respectively. The dependences of absorption properties on the dimensions of the ADRS and material parameters of the ADRS are discussed. It is concluded that the upper layer of the ADRS acts as an impedance-matching layer directly influencing the absorption intensity, while bottom layer offers frequency selectivity in the 13-15 GHz range. The current design uses a low-permittivity ADRS, with simplified design and easy preparation and is notably different from conventional ternary-structured metamaterial absorbers based on a metallic resonance surface. The simplicity of the proposed BMA makes it a promising low-cost ambient 2 / 15 temperature alternative to conventional metamaterial absorbers and could open up practical applications.

Higher Performance Honeycomb Sandwich Metamaterial Microwave Absorber Based on Porous Carbon Combined with Ferroferric Oxide

“…As for power loss in Figure g, it concentrates on the central location of the sandwich metamaterial structure, which is more similar to the magnetic-filed distribution. According to the theory of quarter wavelength, these results reveal that the major power loss at 5.8 GHz is mainly derived from λ/4 magnetic resonance. , …”

“…As the frequency continues to increase, the effect of the magnetic field on metamaterial structures has been attenuated gradually with the electrical losses occupying the main energy loss. The design of sandwich metamaterials has completed the transformation of traditional materials at different scales in the field of microwave absorption. , The enhancement of RL and the broadening of absorption bandwidth certificated the sandwich metamaterials based on P–C-800@Fe 3 O 4 is an excellent absorbing material, and this will accelerate the production and application subsequently.…”

“…According to the theory of quarter wavelength, these results reveal that the major power loss at 5.8 GHz is mainly derived from λ/4 magnetic resonance. 28,29 As the frequency increases to 8.9 GHz, the electric and magnetic field distributions are shown in Figure 10b,e. The electric field intensity is stronger than 5.8 GHz, while the magnetic field has not undergone significant changes.…”

“…The design of sandwich metamaterials has completed the transformation of traditional materials at different scales in the field of microwave absorption. 28,33 The enhancement of RL and the broadening of absorption bandwidth certificated the sandwich metamaterials based on P−C-800@Fe 3 O 4 is an excellent absorbing material, and this will accelerate the production and application subsequently.…”

A multi-band closed-cell metamaterial absorber based on a low-permittivity all-dielectric structure

“…Our group has proposed a series of MAs based on LPDs including hole arrays 31,32) and a cross-shaped array. 33) These MAs can realize two to six absorption bands, which prove the feasibility of LPDs in the field of stealth.…”