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Frequency Selective Surfaces and Metasurfaces offer a range of applications such as absorbers, sensors, filters, energy harvesters, and Reflective Intelligent Surfaces (RIS). In this work, a new degree of freedom is proposed for unit cell element of an FSS-based absorber. This is achieved with the help of additive manufacturing. The 3D rotation of cells is embedded in a 3D-printed substrate. The final prototype is developed using a stereolithography-based 3D printer using photo resistive resin material. Separately, unit cell patterns are screen printed on a matt PET sheet. On top of the substrate, these resistive unit cells are cut and mounted. By doing so, oblique incidence performance has been improved. More than 90% absorption is achieved for oblique incidence angle up to 60°. This article particularly discusses the fabrication challenges and how to deal with it. This includes optimization of printer parameters and substrate design as well as screen printing of the resistive ink.

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Fabrication Process Development of a Three Dimensionally Rotated FSS Unit Cell for Wide-Angle Microwave Absorbers

  • 会议论文

  • 发表日期：

    2025年

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  • Jyoti Yadav,
  • Kajal Chaudhary,
  • Kumar Vaibhav Srivastava,
  • J. Ramkumar

摘要

Frequency Selective Surfaces and Metasurfaces offer a range of applications such as absorbers, sensors, filters, energy harvesters, and Reflective Intelligent Surfaces (RIS). In this work, a new degree of freedom is proposed for unit cell element of an FSS-based absorber. This is achieved with the help of additive manufacturing. The 3D rotation of cells is embedded in a 3D-printed substrate. The final prototype is developed using a stereolithography-based 3D printer using photo resistive resin material. Separately, unit cell patterns are screen printed on a matt PET sheet. On top of the substrate, these resistive unit cells are cut and mounted. By doing so, oblique incidence performance has been improved. More than 90% absorption is achieved for oblique incidence angle up to 60°. This article particularly discusses the fabrication challenges and how to deal with it. This includes optimization of printer parameters and substrate design as well as screen printing of the resistive ink.