US 12,325,224 B2
Lightweight, low-thickness, durable and reliable multi-band radar stealth-bulletproof integrated metamaterial
Yaqing Liu, Taiyuan (CN); Guanyu Han, Taiyuan (CN); Chaoyang Wu, Taiyuan (CN); and Guizhe Zhao, Taiyuan (CN)
Assigned to NORTH UNIVERSITY OF CHINA, Taiyuan (CN); and SHANXI ZHONGBEI NEW MATERIAL TECHNOLOGY CO., LTD., Taiyuan (CN)
Filed by NORTH UNIVERSITY OF CHINA, Taiyuan (CN); and SHANXI ZHONGBEI NEW MATERIAL TECHNOLOGY CO., LTD., Taiyuan (CN)
Filed on Aug. 20, 2024, as Appl. No. 18/809,596.
Application 18/809,596 is a continuation of application No. PCT/CN2023/096209, filed on May 25, 2023.
Claims priority of application No. 202310354945.2 (CN), filed on Apr. 6, 2023.
Prior Publication US 2024/0408846 A1, Dec. 12, 2024
Int. Cl. B32B 9/00 (2006.01); B32B 3/14 (2006.01); B32B 9/04 (2006.01); B32B 27/12 (2006.01); B32B 27/16 (2006.01); B32B 27/28 (2006.01); F41H 5/04 (2006.01); H05K 9/00 (2006.01)
CPC B32B 9/005 (2013.01) [B32B 3/14 (2013.01); B32B 9/047 (2013.01); B32B 27/12 (2013.01); B32B 27/16 (2013.01); B32B 27/281 (2013.01); F41H 5/0428 (2013.01); H05K 9/0088 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/0253 (2013.01); B32B 2262/106 (2013.01); B32B 2305/08 (2013.01); B32B 2305/188 (2013.01); B32B 2307/204 (2013.01); B32B 2307/208 (2013.01); B32B 2307/558 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7376 (2023.05)] 9 Claims
OG exemplary drawing
 
1. A multi-band radar stealth-bulletproof integrated metamaterial, comprising:
a ceramic layer;
a bulletproof layer;
a filter layer;
an attenuation layer; and
a reflective layer;
wherein the ceramic layer, the bulletproof layer, the filter layer, the attenuation layer, and the reflective layer are stacked in sequence, and the ceramic layer serves as a projectile facing surface; the bulletproof layer is made of a first ultrahigh molecular weight polyethylene (UHMWPE) fiber composite; the filter layer is a graphene-based metamaterial layer; the attenuation layer is made of a second UHMWPE fiber composite; and the reflective layer is a carbon fiber-based composite layer;
the bulletproof layer and the attenuate layer serve to attenuate incident radar waves;
a circuit resonance of the filter layer serves to simultaneously generate a passband and a stopband for the incident radar waves;
the bulletproof layer and the attenuation layer serve to be controlled by the filter layer in terms of working conditions within different incident radar frequency bands to establish a structure capable of generating λ/4 resonance at both low and high frequencies;
the ceramic layer is formed by splicing a plurality of ceramic pieces in a shape of triangle, square, or hexagon; and
each of the plurality of ceramic pieces has a thickness a1 of 5˜10 mm, a side length of 50˜100 mm, a density ρ1 of 1˜5 g/cm3, a permittivity εr1 of 2˜3, and a dielectric loss angle tangent value tan δe1 of 0.001˜0.01.