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Plasmonics

, Volume 13, Issue 5, pp 1767–1773 | Cite as

A Design for Band Enhanced Dielectric Absorber Based on Fractal-Like Structure

  • Yongdiao Wen
  • Shaobin Liu
  • Haifeng Zhang
  • Lingling Wang
Article
  • 164 Downloads

Abstract

A dielectric metamaterial absorber has been proposed, which consists of fractal-like structure and conductive sheet. The fractal-like structure is made by the high permittivity dielectric and also is covered by the conductive sheet. Absorptivity of such a dielectric metamaterial absorber is 99.1%, which can be found at 10.196 GHz; meanwhile, the absorber is polarization insensitive. To enhance the bandwidth of absorber, a novel absorber also is proposed, whose bandwidth is 0.566 GHz, which ranges from 9.752 to 10.318 GHz, and relative bandwidth is 5.64%. The maximum absorptivity can reach to 99.8%, and the proposed absorber also is polarization insensitive. In the meantime, the absorber shows excellent performance which is incident angle insensitive; when the incident angle is increased to 70°, the absorptivity is larger than 75%.

Keywords

Dielectric metamaterial absorber Bandwidth enhanced Polarization insensitive Angle insensitive 

Notes

Funding Information

Funding of Jiangsu Innovation Program for Graduate Education (KYLX16_0368); National Natural Science Foundation of China (Grant No.61671238); Chinese Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 1501016A); Project Funded by China Postdoctoral Science Foundation (Grant No. 2015M5817100); and the special grade of the financial support from the China Postdoctoral Science Foundation (Grant No. 2016T100455).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Radar Imaging and Microwave Photonics (Nanjing Univ. Aeronaut. Astronaut.), Ministry of EducationNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.School of Electronics and Optics EngineeringNanjing University of Posts and TelecommunicationsNanjingChina

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