A novel ultra-broadband absorber based on carbon-coated honeycomb panels combined with metamaterials

Abstract

In this paper, a radar absorber with composite structure of metsurface /honeycomb is proposed. Carbon coating is used as a loss material, and honeycomb sandwich structure is used as a support layer to enhance mechanical strength. Introducing impedance matching layer in the top layer of honeycomb absorber (HA) can significantly improve the low-frequency absorption performance. The simulation results show that the absorption efficiency of the combined structure absorber can reach more than 90% in the frequency range of 3.65-17.3GHz. We verified the simulation results through experiments. This method provides an idea for the design of ultra-wideband absorber and has a potential application prospect in stealth material design.

An efficient parameter-retrieval-based surrogate-assisted optimization of on-platform honeycomb absorbing structures

“…These structures leverage the unique properties of honeycomb materials to achieve effective RCS reduction [15][16][17]. Traditional honeycomb designs are typically developed independently for materials and structures [18][19][20]. However, practical designs need to consider the platform effect, which adds complexity to platform-integrated design due to the multi-scale nature of the platform and honeycomb structures.…”

Dynamic switching: vanadium dioxide and graphene-based terahertz perfect absorber for tunable broadband absorption and tri-band absorption

“…Subsequently, Tao et al and Liu et al achieved nearly perfect narrow-band absorption capabilities [17,18]. Regarding broadband studies, many research groups have achieved successful results by stacking dielectric and metal layers in a sequential manner, resulting in broadband PA absorbers [19][20][21]. Furthermore, the rapid development of electronics and materials has led to the utilization of tunable absorber materials, such as black phosphorus [22], liquid crystals [23], graphene [24][25][26][27][28][29][30][31][32], and VO 2 [33][34][35][36], in this field.…”

A reconfigurable ultra-broadband transparent absorber combined with ITO and structural water

“…However, traditional absorbers are often bulky and have low absorption efficiency. [10][11][12] In recent years, with the booming development of metamaterials, the study of electromagnetic absorption by subwavelength structures has received the attention of many researchers. By reasonably designing the geometrical parameters of metamaterial structures, the effective permittivity as well as the permeability of metamaterial absorbers can be manipulated to achieve impedance matching with the free space.…”