An Easily Optimizable Frequency Selective Absorber Design for X-Band

Year 2022, Volume: 22 Issue: 1, 136 - 141, 28.02.2022

Bora Döken

https://doi.org/10.35414/akufemubid.823419

Abstract

In this paper, a novel frequency selective absorber surface (FSAS) is designed for electromagnetic and radio frequency interference reduction and for to use in stealth technology in X-band (8–12 GHz). At the proposed FSAS, minimum 10 dB reflection loss is achieved for the incidence angles up to 30 degrees. Lumped resistors are inserted into periodic conduction geometries to achieve absorption frequency behavior. Equivalent circuit model of periodic geometries is used in the design and optimization stages. The main advantage of the design is its resonance frequency can easily be optimized by one parameter which controls the equivalent capacitance. In order to achieve this goal, a novel FSAS geometry has been designed in which equivalent capacity is dominant in determining the resonant frequency of the surface.

Keywords

Frequency Selective Surface, FSS, Absorber, Periodic Structures

Eniyilemesi X-Bandında Kolaylıkla Gerçekleştirilebilen Frekans Seçici Soğurucu Yüzey Tasarımı

Abstract

Bu çalışmada, X-bandında (8–12 GHz), elektromanyetik ve radyo frekansı girişim etkilerini azaltma ve görünmezlik teknolojisinde kullanılmak üzere yeni bir frekans seçici soğurucu yüzey (FSSY) tasarımı anlatılmaktadır. Periyodik geometrilerin toplu parametreli dirençlerle beraber kullanması ile soğurucu yüzey davranışı elde edilmiştir. Önerilen FSSY geometrisi 30 derecelik kadar geliş açısına kadar üzerine gelen elektromanyetik dalgaları minimum 10 dB zayıflatarak yansıtmaktadır. Eşdeğer devre modeli tasarım ve eniyileme aşamalarında etkin bir şekilde kullanılmıştır. Önerilen FSSY geometrisinin rezonans frekansının eniyilemesi sadece bir parametresinin değerinin değiştirilmesi ile X-bandı içinde kolaylıkla gerçekleştirilebilmektedir. Bu özellik, eşdeğer devre kapasitesi rezonans frekansı üzerindeki etkisi güçlü olan bir tasarım ile gerçekleştirilmiştir. Tasarımların benzetimi Ansoft HFSS v.19.1 yazılımı ile gerçekleştirilmiştir.

Keywords

Frekans Seçici Yüzey, FSY, Soğurucu Yüzeyler, Periyodik Yapılar

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