Metamalzeme tabanlı çok bantlı enerji hasadı uygulaması

Öz

Bu çalışmada, değişik boyutlu halka rezonatörlerinden oluşan mükemmel sinyal emici özellik gösteren bir metamalzeme enerji hasadı uygulaması için, tasarım, üretim, simülasyon ve deneysel çalışmaları gerçekleştirilmiştir. Önerilen yapının en önemli avantajlarından birisi, benzer çalışmaların aksine hiçbir tasarım öğesi değiştirilmeden 1.8GHz, 2.45 GHz ve 2.60 GHz de doğal olarak mükemmel sinyal emici özelliği göstermesidir. Bu değerler yapının hem GSM (Global System for Mobile) hem de ISM (Industrial Scientific Medical) bantlarında enerji hasadı amaçlı kullanılabileceğini göstermektedir. Simülasyon çalışmaları CST Microwave Studio programında gerçekleştirilmiştir, belirtilen bantlarda rezonatörler üzerinde oluşan enerjinin hasadı için HSMS 2860 Schottky diyot kullanılmıştır. Simülasyon sonuçlarını desteklemek için yansıma katsayısı (S11) ölçümü, diyot etkisinin belirlenmesi, spektrum analizör ve dc voltaj ölçümleri deneysel olarak gerçekleştirilmiştir. Yansıma katsayısı ölçümlerinde rezonans frekanslarında  -20dB lik bir değer elde edilirken, spektrum analizör ölçümünde yaklaşık 30dBm lik bir artış söz konusudur. Diyot üzerinde dc gerilim ölçümünde 47.6mV’ luk bir gerilim gözlenmiştir. Elde edilen deneysel ve simülasyon sonuçları birbirleri ile uyumlu olup önerilen yapının çok bantlı enerji hasadı uygulamalarında kullanılabileceğini göstermektedir.

Anahtar Kelimeler

• Metamalzeme,enerji hasadı,çok bantlı

Metamaterial based multiband energy harvesting application

Öz

In this study, perfect metamaterial absorber based structure, which consists of variable sized ring resonators is designed, produced, simulated and experimentally tested for energy harvesting applications. One of the major advantages of proposed structure is to achieve perfect signal absorber ability at 1.8GHz, 2.45 GHz and 2.60 GHz frequencies without making any alteration in design contrary to similar studies. These frequencies present that this structure can be applicable in both GSM (Global System for Mobile) and ISM (Industrial Scientific Medical) bands for energy harvesting purposes. Simulation studies are implemented by using CST Microwave Studio software and HSMS 2860 Schottky diode is used to harvest produced energy on resonators at stated bands. Reflection coefficient (S11) measurement, determination of the effects of Schottky diode on reflection, spectrum analyser measurement and dc voltage measurements are completed experimentally in order to validate simulation study results. While -20dB difference in resonance frequencies is observed during reflection coefficient measurements, 30dBm increment in resonance frequencies occurred during spectrum analyser measurement. 47.6mV is observed on Schottky diode during dc voltage measurements. Obtained both experiment and simulation results are congruent with each other and it indicates that proposed structure is appropriate for using in multiband energy harvesting applications. 

Anahtar Kelimeler

• Metamaterial,energy harvesting,multi band

Kaynakça

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