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Summary
This summary is machine-generated.

This study presents an ultra-wideband absorber with stable performance under oblique incidence. Its unique design ensures consistent absorption across a wide frequency range, making it suitable for demanding applications.

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Area of Science:

  • Electromagnetic compatibility and microwave absorption technologies.
  • Metamaterial and metasurface applications in advanced electronics.

Background:

  • Conventional absorbers often exhibit degraded performance at oblique incidence angles.
  • Achieving broadband and polarization-insensitive absorption simultaneously remains a challenge in absorber design.

Purpose of the Study:

  • To develop an ultra-wideband (UWB) and polarization-insensitive frequency-selective surface (FSS) absorber.
  • To achieve stable absorption performance under oblique incidence of electromagnetic waves.
  • To explore the potential of graphene-based hybrid resonators for advanced absorber functionalities.

Main Methods:

  • Utilizing two hybrid resonators realized by symmetrical graphene patterns.
  • Optimizing impedance-matching for oblique incidence conditions.
  • Employing an equivalent circuit model to analyze the absorber's mechanism.

Main Results:

  • Demonstrated broadband absorption with a fractional bandwidth (FWB) of 136.4%.
  • Achieved stable absorption performance up to an incidence angle of 40°.
  • Exhibited polarization-insensitive absorption characteristics.

Conclusions:

  • The proposed UWB absorber offers significantly improved stability at oblique incidence compared to conventional designs.
  • The graphene-based hybrid resonator approach is effective for broadband and polarization-insensitive absorption.
  • The developed absorber shows strong potential for competitive integration into aerospace applications.