A radar-infrared compatible stealth surface is designed and analyzed.Without modifying the radar absorbing material(RAM),the design can theoretically achieve radar-infrared compatibility and broadband radar absorption...A radar-infrared compatible stealth surface is designed and analyzed.Without modifying the radar absorbing material(RAM),the design can theoretically achieve radar-infrared compatibility and broadband radar absorption through surface patterns and structures.A transmission-line-based model(TLM)is developed to analyze the radar absorbing performance of the surface.Optimization of the structure geometries is conducted aiming to maximize the-10 d B absorption bandwidth in 2–18 GHz.Surface with optimized structure geometries exhibits a superior absorption bandwidth,more than twice the bandwidth of the original 1.5 mm RAM slab,while maintaining a relatively low infrared emissivity.展开更多
In this paper,we propose a polarization-independent and broadband perfect infrared(IR)metamaterial absorber(MA)without reflective backing.The proposed absorber is a periodic meta-atom array consisting of metal-dielect...In this paper,we propose a polarization-independent and broadband perfect infrared(IR)metamaterial absorber(MA)without reflective backing.The proposed absorber is a periodic meta-atom array consisting of metal-dielectric-multilayer truncated cones which can absorb 80%EM wave from 50.70 to 81.87 THz,while transmit 80%EM wave from 0 to 37.71 THz.With the decreasing of frequency,the transmissivity increases,which is close to 100%from 0 to 5 THz.We can broaden the absorption bandwidth of the MA by cascading multi-layers truncated cones.Furthermore,the proposed IR MA promises to be one desirable stealth material for radar-IR compatibility.展开更多
基金the Science&Technology Innovation Fund of AVIC Manufacturing Technology Institute,China(Grant No.KS91007113)。
文摘A radar-infrared compatible stealth surface is designed and analyzed.Without modifying the radar absorbing material(RAM),the design can theoretically achieve radar-infrared compatibility and broadband radar absorption through surface patterns and structures.A transmission-line-based model(TLM)is developed to analyze the radar absorbing performance of the surface.Optimization of the structure geometries is conducted aiming to maximize the-10 d B absorption bandwidth in 2–18 GHz.Surface with optimized structure geometries exhibits a superior absorption bandwidth,more than twice the bandwidth of the original 1.5 mm RAM slab,while maintaining a relatively low infrared emissivity.
基金supported by the National Science Foundation of China(Grant Nos.61331005,60501502 and 61501497).
文摘In this paper,we propose a polarization-independent and broadband perfect infrared(IR)metamaterial absorber(MA)without reflective backing.The proposed absorber is a periodic meta-atom array consisting of metal-dielectric-multilayer truncated cones which can absorb 80%EM wave from 50.70 to 81.87 THz,while transmit 80%EM wave from 0 to 37.71 THz.With the decreasing of frequency,the transmissivity increases,which is close to 100%from 0 to 5 THz.We can broaden the absorption bandwidth of the MA by cascading multi-layers truncated cones.Furthermore,the proposed IR MA promises to be one desirable stealth material for radar-IR compatibility.
