Frequency selective binary metasurface with two high-selectivity transmission passbands and wideband RCS reduction

Area of Science:

• Electromagnetics and Metamaterials
• Antenna and Radar Systems
• Materials Science

Background:

• Stealth technology requires integrating multiband communication with radar cross-section (RCS) reduction.
• Designing radomes that support multiple transmission channels while suppressing radar signals is a significant challenge.

Purpose of the Study:

• To propose and demonstrate a novel frequency-selective binary metasurface (FSBM) for simultaneous dual-passband transmission and wideband RCS suppression.
• To enable advanced stealth radomes for multiband radar and communication systems.

Main Methods:

• Design of a hybrid metasurface combining a binary coding metasurface (top layer) and a frequency-selective surface (FSS) (bottom layer).
• Utilizing artificial magnetic conductor (AMC) units for destructive interference and FSS with aperture-coupled resonators for filtering.
• Fabrication and experimental measurement of a prototype FSBM.

Main Results:

• Achieved dual transmission bands at 5.14 GHz and 7.61 GHz with low insertion loss and steep roll-off.
• Demonstrated wideband RCS reduction exceeding 76.3% fractional bandwidth for -10 dB.
• Validated the FSBM's capability for simultaneous multiband transmission and RCS suppression.

Conclusions:

• The proposed FSBM offers a viable solution for integrating multiband functionality with stealth capabilities in radomes.
• This technology paves the way for developing next-generation low-scattering platforms for diverse radar and communication applications.