Infrared camouflage and radar compatible stealth structure based on metamaterial
In this study, an infrared camouflage and radar compatible stealth structure based on metamaterial is designed and fabricated. Two types of frequency selective surfaces (FSS) with different infrared emissivity values are arranged into a specific pattern, which is similar to a visible camouflage patt...
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Veröffentlicht in: | Optical materials express 2023-05, Vol.13 (5), p.1513 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this study, an infrared camouflage and radar compatible stealth
structure based on metamaterial is designed and fabricated. Two types
of frequency selective surfaces (FSS) with different infrared
emissivity values are arranged into a specific pattern, which is
similar to a visible camouflage pattern. The different infrared
emissivity regions in the infrared camouflage layer (IRCL) are 0.27,
0.55, and 0.93, and the radar waves transmittance within 18 GHz is
greater than 98%. Below the IRCL is a wideband radar
metamaterial absorber based on square-ring resonant elements, which
can absorb the radar waves and dissipate them through ohmic loss. The
particle swarm optimization algorithm combined with the equivalent
circuit model rapidly optimises the structure of the radar
metamaterial abosrber, achieving an absorption rate greater than
90% from 4.5 GHz-18 GHz. And the absorption efficiency still
maintains 80% at an oblique incidence range of 45°. The
Indium Tin Oxide (ITO) film was etched by laser to obtain the above
microstructures. The combination of two layers of metamaterial
structure realizes the compatible stealth capability of infrared
camouflage and radar absorption. |
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ISSN: | 2159-3930 2159-3930 |
DOI: | 10.1364/OME.488234 |