DESIGN OF PERFECT METAMAETIRAL ABSORBER FOR MICROWAVE APPLICATIONS

Abstract

   Metamaterials are materials that are not found directly in nature and exhibit extraordinary electromagnetic properties. Today, metamaterials have a wide range of application areas such as medical, image processing, signal absorption, cloaking, sensor, antenna etc. Metamaterials increases gain of the materials since it has extraordinary electromagnetic properties. In this study, signal absorption of metamaterials is discussed and analyzed as detailed. For this purpose, a metamaterial has excellent signal absorption was designed and its numerical results were obtained. According to results, the perfect signal absorption ratio is 99.98% at the frequency of 11.227 GHz. In addition, a parametric study has also been realized to demonstrate the mechanical adjustability of the structure. This work is performed for microwave application and it can also be adapted for different frequency bands.

Keywords

• Metamaterials,absorber,microwave

MİKRODALGA UYGULAMALARI İÇİN MÜKEMMEL METAMALZEME SİNYAL EMİCİ TASARIMI

Öz

   Metamalzemeler doğada direkt olarak bulunmayan ve sıra dışı elektromanyetik özellikler gösteren malzemelerdir. Günümüzde metamalzemelerin çok çeşitli uygulama alanları bulunmaktadır. Bunlar; medikal, görüntü işleme, sinyal emilimi, görünmezlik pelerini, sensör, anten vb. Metamalzemeler gösterdiği sıra dışı elektromanyetik özellikler ile malzemelerde kazanç artışı sağlamaktadır. Bu çalışmada metamalzemelerin sinyal emilimi ele alınmıştır. Bu amaçla mükemmel sinyal emilimi yapabilen bir metamalzeme tasarlanmış ve nümerik sonuçları elde edilmiştir. Elde edilen sonuçlara göre amaçlanan metamalzeme 11,227 GHz frekansında %99,98 gibi mükemmel bir oranda gelen sinyali emebilmektedir. Ayrıca, yapının mekanik ayarlanabilirlik özelliğinin de göstermek amacıyla parametrik bir çalışma da gerçekleştirilmiştir. Mikrodalga için yapılan bu çalışma farklı frekans bantları için de uyarlanabilir. 

Anahtar Kelimeler

• Metamalzeme,sinyal emilimi,mikrodalga

Kaynakça

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