Back to Search
Start Over
A low-frequency ultrathin metamaterial absorber using magnetic material.
- Source :
- Journal of Applied Physics; 2/28/2024, Vol. 135 Issue 8, p1-6, 6p
- Publication Year :
- 2024
-
Abstract
- In this paper, an ultra-thin metamaterial absorber (UMA) in the S-band is designed. The overall structure adopts a three-layer design. The top layer is a magnetic material, and the middle layer of the UMA is composed of a centrally symmetrical open square ring (four edges are opened) and a circular pattern placed at the center, which is etched on the FR4 dielectric substrate by printed circuit board technology. The absorptivity of the absorber is more than 90% in 1.73–4.04 GHz under normal incidence, and the fractional bandwidth is 80.1%. The total thickness of the absorber is about 3.4 mm, corresponding to 0.02 λ L at the lowest operating frequency. Moreover, it also has good polarization insensitivity and wide-angle incident characteristics. The absorption mechanism of the UMA is analyzed from the aspects of power loss density and surface current. Finally, a sample was fabricated and measured. The measured results are in good agreement with the simulation results, which verifies the effectiveness of the design method. [ABSTRACT FROM AUTHOR]
- Subjects :
- MAGNETIC materials
DENSITY currents
PRINTED circuits
POWER density
METAMATERIALS
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 135
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 175797279
- Full Text :
- https://doi.org/10.1063/5.0192913