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Agile Stealth: Bioinspired Metamaterials with Continuous Dynamic Tuning.

Gang Wang1, Dawei Li1, Wenhe Liao1

  • 1School of Mechanical Engineering (SME), Nanjing University of Science and Technology (NJUST), 200 Xiao Ling Wei Road, Nanjing, 210094, China.

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PubMed
Summary
This summary is machine-generated.

This study presents a bioinspired metamaterial for advanced stealth, achieving ultra-wideband absorption and dynamic frequency tuning. The reconfigurable design enables adaptive radar cross-section reduction for intelligent stealth systems.

Keywords:
adaptive radar cross sectionbionics‐inspiredcontinuous tuningreconfigurable metamaterialsultra‐broadband absorption

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Area of Science:

  • Materials Science
  • Electromagnetics
  • Nanotechnology

Background:

  • Achieving simultaneous high-efficiency broadband absorption and frequency agility in metamaterials is crucial for advanced stealth.
  • Existing metamaterials often struggle to balance wideband absorption with tunable frequency selectivity.

Purpose of the Study:

  • To introduce a bioinspired reconfigurable metamaterial with a novel dynamic structure-function design.
  • To overcome the limitations of current metamaterials in achieving dual-mode performance for stealth applications.

Main Methods:

  • A bioinspired design mimicking moth-eye morphology with a mechanical transmission system to control internal petal structures.
  • Geometric reconfiguration to actively reshape surface impedance.
  • Incorporation of coded driving for 2D control of frequency and amplitude.

Main Results:

  • Ultra-wideband absorption (≥90%) across 2-40 GHz spectrum.
  • Continuous tuning of at least six distinct, high-efficiency (≥99%) absorption peaks with >3 GHz bandwidth each.
  • Significant broadband radar cross-section (RCS) reduction and adaptive suppression at specific frequencies.

Conclusions:

  • The developed metamaterial demonstrates exceptional dual-mode performance, enabling both broadband absorption and dynamic frequency agility.
  • This bioinspired reconfigurable metamaterial paves the way for intelligent and high-performance adaptive stealth systems.
  • The dynamic structure-function design offers a new paradigm for advanced electromagnetic applications.