Design and verification of periodic metallic mesh structures for optical windows

İlker Günay; Tolga Yelboğa; Asım Egemen Yılmaz

doi:10.1117/12.2676354

4 October 2023 Design and verification of periodic metallic mesh structures for optical windows

İlker Günay, Tolga Yelboğa, Asım Egemen Yılmaz

Proceedings Volume 12646, Metamaterials, Metadevices, and Metasystems 2023; 1264607 (2023) https://doi.org/10.1117/12.2676354
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

RADAR Cross Section (RCS) is an essential factor in modern defense applications for detection and identification of platforms. Careful management of RCS requirements is crucial from initial design phase to integration stage. Electrooptical sensors create discontinuities on the frame of the platform which can negatively impact the low RCS requirement. To ensure the low RCS requirement, discontinuities, either as protrusion or opening, shall be electrically conductive and optically transparent. The use of metasurfaces, designed with a periodic mesh structure, is a widely adopted approach meeting these requirements. Electromagnetic and optical performance of periodic mesh structure depend on parameters such as shape of elements, dimensions of elements, interelement spacing, substrate material parameters etc. This paper starts with the analysis of electromagnetic shielding effectiveness of periodic mesh structure via equivalent circuit method (ECM) and Floquet Port Modes. ANSYS HFSS and CST MWS software are used for the analysis of Floquet Port Modes. Analysis results are compared with measurements via coaxial holder method stated in ASTM D 4935 standard. Samples used in coaxial holder is produced with photolithography. Aligned dual antennae method referred in IEEE 299 is used as verification technique. Additionally, diffraction effects from the mesh structure are analyzed and measured in the visible and mid-wave range.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

İlker Günay, Tolga Yelboğa, and Asım Egemen Yılmaz "Design and verification of periodic metallic mesh structures for optical windows", Proc. SPIE 12646, Metamaterials, Metadevices, and Metasystems 2023, 1264607 (4 October 2023); https://doi.org/10.1117/12.2676354

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