A thin radar-infrared stealth-compatible structure： Design, fabrication, and characterization
摘要
A thin radar-infrared stealth-compatible structure with reflectivity below 10 dB in the whole radar X wave band and infrared emissivity less than 0.3 in the infrared region of 8μm–14μm is reported.The designed stealth-compatible structure consists of metallic frequency selective surface(MFSS),resistive frequency selective surface(RFSS),and metal backing from the top down,and it is only 2.1-mm thick.The MFSS is made up of some divided low infrared emissivity metal copper films,and the RFSS consists of a capacitive array of square resistive patches.They are placed close together,working as an admittance sheet because of a mutual influence between them,and the equivalent admittance sheet greatly reduces the thickness of the whole structure.The proposed stealth-compatible structure is verified both by simulations and by experimental results.These results indicate that our proposed stealth-compatible structure has potential applications in stealth fields.