Fig. 1. Schematic of multispectral radar-infrared compatible ultra-wideband stealth metasurface

Fig. 2. Detailed structure diagram of unit cell of multispectral radar-infrared compatible ultra-wideband stealth metasurface. (a) Exploded schematic of unit cell of multispectral stealth metasurface; (b) front view of unit cell of ISL; (c) front view of unit cell of RAL; (d) side view of unit cell

Fig. 3. Simulated results of radar stealth. (a) S-parameter and absorptivity; (b) RCS reduction

Fig. 4. Normalized equivalent complex impedance, equivalent permittivity, and permeability obtained by S-parameter inversion method. (a) Normalized equivalent complex impedance; (b) equivalent permittivity and permeability

Fig. 5. Performance analysis of different layers. (a) Absorptivity; (b) loss

Fig. 6. Surface current and energy loss distributions at different resonant frequencies

Fig. 7. Validation results of equivalent circuit model. (a) Equivalent circuit model; (b) simulated and calculated radar stealth results by CST and ADS

Fig. 8. Analysis of metasurface structure parameters. (a) Resonator radius r₁; (b) dielectric layer thickness h₄

Fig. 9. Angular stability. (a) Incident angle; (b) polarization angle

Fig. 10. Photo of sample and test equipment. (a) Photo of array sample with 25×25 unit cells; (b) radar stealth test environment and equipment; (c) radar stealth test results

Fig. 11. Measured results of infrared stealth. (a) Infrared thermal imaging test result of PET; (b) infrared thermal imaging test result of metasurface; (c) metasurface infrared stealth effects at different temperatures; (d) emissivity test results