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Periodic frequency selective surface coupled highly efficient, broadband, single layer microwave absorber

RAVI PANWAR1,* , DHARMENDRA SINGH2, JUNG RYUL LEE3

Affiliation

  1. Discipline of Electronics and Communication Engineering, Indian Institute of Information Technology Design and Manufacturing, Jabalpur, Madhya Pradesh, India
  2. Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Uttrakhand, India
  3. Opto-Electro Structural Laboratory, Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea

Abstract

Microwave absorbing materials and structures have been widely utilized in aeronautic applications and platform. Improving the working absorption bandwidth of traditional microwave absorbing materials (MAMs) has greatly challenged the scientists due to the restriction of the available material parameters. Therefore, in this paper an attempt has been made to develop a broadband absorber using synthesized ferrite nanocomposite and periodic frequency selective surface (FSS) in X-band frequency range. The effect of two different kinds of substrates (i.e., conventional FR4 and synthesized ferrite nanocomposite) has been studied over microwave absorption characteristics of FSS loaded composite structures. The significant enhancement has been observed in -10 dB absorption bandwidth after impacting of FSS over the substrate. The use of ferrite substrate results in superior absorption properties as compared to FR4 substrate. A 2.55 mm thick synthesized ferrite substrate loaded with square loop FSS, provides a minimum reflection coefficient (RC) of -43.2 dB at 9.9 GHz with corresponding bandwidth of 3.7 GHz. The finding reveals a flexible and promising strategy to improve the -10 dB absorption bandwidth of existing MAMs..

Keywords

Microwave absorber, Microwave absorbing material, Ferrite, nanocomposite, Frequency selective surface, Aeronautics, Stealth technology.

Citation

RAVI PANWAR, DHARMENDRA SINGH, JUNG RYUL LEE, Periodic frequency selective surface coupled highly efficient, broadband, single layer microwave absorber, Optoelectronics and Advanced Materials - Rapid Communications, 12, 7-8, July-August 2018, pp.426-430 (2018).

Submitted at: Sept. 27, 2017

Accepted at: Aug. 9, 2018