An infrared transparent microwave broadband metamaterial absorber
A technology of infrared transmission and metamaterials, applied in the direction of antennas, electrical components, etc., can solve the problems of impenetrable incident electromagnetic waves and limited applications, and achieve the effects of simple structure, mature processing technology and convenient processing
Active Publication Date: 2022-04-01
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
However, most metamaterial absorbers use a metal plate as the underlying reflective structure, resulting in the impermeability of incident electromagnetic waves in all frequency bands, which greatly limits its application in electromagnetic shielding optical windows.
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Embodiment 1
[0031] Embodiment 1: A microwave broadband metamaterial absorber through infrared transmission, including a plurality of periodically arranged structural units, such as Figure 7 shown. The structural unit includes an upper metal resonant layer 1, a first dielectric substrate 2, a middle metal resonant layer 3, a second dielectric substrate 4 and a lower metal grid layer 5. The upper metal resonant layer 1 is plated on the first The upper surface of the dielectric substrate 2, the middle metal resonant layer 3 is plated on the lower surface of the first dielectric substrate 2, and the lower metal grid layer 5 is plated on the lower surface of the second dielectric substrate 4, such as figure 2 As shown; the upper metal resonant layer 1 and the middle metal resonant layer 3 are metal open rings, and the upper metal resonant layer 1 in this example is two concentric metal open rings with different radii, such as image 3 As shown; the middle metal resonant layer 3 in this exam...
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An infrared transparent microwave broadband metamaterial absorber includes a plurality of periodically arranged structural units, the structural units include an upper metal resonant layer, a first dielectric substrate, a middle metal resonant layer, and a second dielectric The substrate and the lower metal grid layer; the upper metal resonant layer is plated on the upper surface of the first dielectric substrate, the middle metal resonant layer is plated on the lower surface of the first dielectric substrate, and the lower metal resonant layer The grid layer is plated on the lower surface of the second layer of dielectric substrate; the first layer of dielectric substrate is connected with the second layer of dielectric substrate. The invention can realize the absorbing and shielding effect on the incident electromagnetic wave in the 5-20GHz common microwave radar band, the absorption rate reaches more than 80%, and the electromagnetic wave in the infrared band can pass through, so it has a high application prospect in the electromagnetic shielding optical window.
Description
technical field [0001] The invention relates to the technical field of radar stealth and new artificial electromagnetic materials, in particular to an infrared-transmitting microwave broadband metamaterial wave absorber. Background technique [0002] The traditional metamaterial absorber has low absorption intensity for incident electromagnetic waves and narrow absorption bandwidth, which cannot meet the needs in practical applications. [0003] In modern radar and hybrid wireless communication systems, electromagnetic shielding optical windows are often introduced into the design of metamaterial absorbers to meet the needs of multi-spectral applications: that is, while absorbing low-frequency incident electromagnetic waves, the overall structure has high sensitivity to infrared to visible light bands. Transmission target. However, most metamaterial absorbers use a metal plate as the underlying reflective structure, resulting in the impermeability of incident electromagneti...
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IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 董红星张亚强张龙姜雄伟牟南历
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI