Research on the efficient EM modeling method from multilayered anisotropic medium-metal composite targets

Area of Science:

• Electromagnetic theory
• Computational electromagnetics
• Radar systems engineering

Background:

• Electrically large radar targets coated with multi-layered anisotropic mediums (MLAMs) present complex electromagnetic (EM) scattering challenges.
• Accurate modeling of EM scattering is crucial for radar target identification, stealth design, and performance assessment.

Purpose of the Study:

• To develop a high-frequency modeling approach for analyzing EM scattering from electrically large radar targets coated with MLAMs.
• To validate the proposed method against established numerical techniques and demonstrate its computational efficiency.
• To apply the approach for optimizing the radar cross-section (RCS) of aircraft for stealth applications.

Main Methods:

• Derivation of plane-wave spectrum for incident EM fields within MLAMs.
• Spectral domain full-wave analysis method (SDFWAM) for analytical scattering field representation.
• Saddle point evaluation (SPE) for asymptotic spatial domain solutions.
• Integration of physical optics (PO) and tangent plane approximation for far-field analysis.

Main Results:

• The proposed method shows strong agreement with the hybrid Method of Moments - Finite Element Method (MoM-FEM) numerical algorithm.
• Demonstrated significant computational efficiency compared to traditional methods.
• Successfully applied to optimize the RCS of the Su-57 aircraft, achieving precise control at minimal material cost.

Conclusions:

• The developed high-frequency modeling approach provides accurate and efficient EM scattering prediction for complex radar targets.
• This research lays foundational groundwork for advanced stealth design and radar target performance evaluation.
• The method enables precise and intelligent RCS control, crucial for modern defense applications.