Date:

2025-04-30

Title of Paper:

Design and Characterization of Radar Absorbing Structure Based on Gradient-Refractive-Index Metamaterials

Journal:

Compsites Part B

Summary:

A gradient-refractive-index radar absorbing structure for stealth aircraft was proposed
in this paper. It is a layered shell composed of a gradient-refractive-index refractor, an
absorber and a reflector. The gradient-refractive-index refractor consists of isotropic
nonresonant woodpile metamaterials, which was designed according to the permittivity
distribution equation of the electromagnetic black hole to mimic the controllability over the
propagation of the electromagnetic waves. The absorber dissipates the electromagnetic
waves and transforms them to be heat energy. The reflector reflects the electromagnetic
waves to the absorber and prevents electromagnetic waves from entering the inner space of
aircraft. A ring and a board gradient-refractive-index radar absorbing structures were
designed and fabricated by the three-dimensional printing process of stereolithography.
Simulation and experimental results show that the absorption capacity of this proposed
structure is better than -10dB in 12~18GHz. The gradient-refractive-index refractor and the
absorber have almost equal contributions to the absorption capability. The feasibility of this
novel radar absorbing structure has been demonstrated and this research would be a
foundation for its the further applications in stealth aircraft.

Co-author:

Lixian Yin, Jonathan Doyhamboure--Fouquet, Xiaoyong Tian*, and Dichen Li

Translation or Not:

No

Date of Publication:

2017-09-02