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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

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A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
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Related Experiment Video

Updated: Jan 12, 2026

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Polarization-controlled coding metasurface with phase cancellation and diffusion for enhanced radar cross section

Muhammad Ubaid Ullah1, Tarik Abdul Latef2,3, Mohamadariff Othman1,4

  • 1Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya (UM), 50603, Kuala Lumpur, Malaysia.

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|November 3, 2025
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Summary

This study introduces a novel metasurface for broadband radar cross-section (RCS) reduction, achieving significant signal scattering and suppression. The design integrates polarization conversion and phase cancellation for enhanced electromagnetic wave manipulation and stealth applications.

Keywords:
CodingDiffusionMetasurfacePolarization conversionRadar cross section reduction

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Area of Science:

  • Electromagnetics and Metamaterials
  • Applied Physics
  • Radar Technology

Background:

  • Metasurfaces offer tunable electromagnetic properties for wave manipulation.
  • Reducing radar cross-section (RCS) is crucial for stealth applications.
  • Broadband RCS reduction requires sophisticated metasurface designs.

Purpose of the Study:

  • To develop and validate a novel metasurface for broadband RCS reduction.
  • To integrate polarization conversion, diffusion, and phase cancellation mechanisms.
  • To investigate the metasurface's performance under normal and oblique incidence.

Main Methods:

  • A rotationally symmetric metasurface design with optimized unit cell size.
  • Integration of 1-bit and 2-bit phase control using Pancharatnam-Berry phase.
  • Genetic algorithm (GA) optimization for unit cell arrangement.
  • Electromagnetic simulations and experimental validation.

Main Results:

  • The 1-bit metasurface achieved ~10 dB RCS reduction over a 43.81% relative bandwidth (12.3-19.2 GHz).
  • The 2-bit metasurface achieved ~20 dB RCS reduction over a 46.65% relative bandwidth (12-19.3 GHz) and ~10 dB over 58.60% (11.1-20.3 GHz).
  • Significant RCS reduction was maintained at oblique incidence angles up to 15° (1-bit) and 30° (2-bit).

Conclusions:

  • The proposed metasurface effectively reduces RCS across a broad frequency range.
  • The design demonstrates robust performance under varying incidence angles.
  • This technology holds potential for advanced stealth and electromagnetic wave control.