Development of diverse coding metamaterial structure for radar cross section reduction applications.

Area of Science:

• Electromagnetics and Materials Science
• Metamaterials and Wave Manipulation

Background:

• Metamaterials offer advanced electromagnetic properties but face limitations.
• Coding metamaterials are of growing interest for controlling electromagnetic waves.
• This research focuses on circular coding metamaterials for microwave applications.

Purpose of the Study:

• To investigate circular-shaped coding metamaterial for microwave frequency applications.
• To analyze 1-bit coding metamaterial unit cells with distinct phase responses.
• To evaluate the radar cross-section (RCS) reduction capabilities of layered metamaterial structures.

Main Methods:

• Analysis of 1-bit coding metamaterial unit cells (0 and π phase responses).
• Numerical calculation of RCS reduction using Computer Simulation Technology (CST) software.
• Comparison of single, double, and triple-layered metamaterial structures.

Main Results:

• The proposed '1' element achieved phase responses >180° across C, X, and Ku-bands.
• Triple-layered coding metamaterial structures demonstrated significant RCS reduction (near -30 dBm² at 2 GHz).
• Transmission coefficients for triple-layered structures were numerically calculated.

Conclusions:

• 1-bit coding metamaterials, when arranged in controlled sequences, can effectively control electromagnetic waves.
• Advanced coding metamaterial designs exhibit controllable scattering patterns and reduced RCS.
• The study highlights the potential of circular coding metamaterials for diverse functionalities.