Thermal infrared and broadband microwave stealth glass windows based on multi-band optimization

Area of Science:

• Materials Science
• Metamaterials
• Electromagnetics

Background:

• Increasing detection technologies necessitate advanced stealth solutions for military and personal privacy.
• Existing stealth technologies often lack multi-band compatibility, limiting their application.
• Metamaterials offer unique electromagnetic properties for designing advanced functional devices.

Purpose of the Study:

• To design and verify a metamaterial window with simultaneous stealth capabilities in thermal infrared and broadband microwave ranges.
• To optimize the metamaterial design for multi-band performance using particle swarm optimization.
• To evaluate the window's performance in terms of microwave absorption, infrared emissivity, visible transmittance, and thermal stability.

Main Methods:

• Design of a metamaterial window structure.
• Utilizing particle swarm optimization for multi-band performance optimization.
• Experimental verification of microwave absorption, infrared emissivity, and visible transmittance.
• Testing thermal stability up to 200 °C.

Main Results:

• Achieved over 90% microwave absorption across 5.1-19.2 GHz (X and Ku bands).
• Demonstrated low infrared emissivity of approximately 0.15.
• Maintained visible transmittance above 60%.
• Retained performance up to 200 °C due to material properties.

Conclusions:

• The developed metamaterial window provides effective multi-band stealth in infrared and microwave spectra.
• The particle swarm optimization approach is suitable for multi-band metamaterial design.
• Potential applications include electromagnetic shielding, stealth technologies, and smart windows.