Yılmaz DURNA, Hüseyin AKÇELİK, Çağdaş TUNA, Şafak SARAYDEMİR, Hasan KOÇER

Karıştırma duyarsız frekans atlamalı metamalzeme tabanlı elektromanyetik çit uygulaması

Günümüzde kullanılan ve en iyi bilinen gözetim ve çevre koruma sistemleri, çitler, duvarlar ve kameralargibi geleneksel araçlarla birlikte kişi odaklı hizmetlerle sağlanmaktadır. Ancak, geleneksel teknikler herzaman etkili bir şekilde tehditleri tespit edemez. Üstelik çeşitli sensörlerden faydalanan çitler reaksiyonsüresi açısından meydana gelen sızmalara karşı zayıf kalabilmektedir. Bu çalışmada, yeterli reaksiyon süresisağlayıp tehditleri önleyebilmek maksadıyla, laboratuvar şartlarında yazılım tabanlı telsiz desteklielektromanyetik çit uygulaması önerilmiştir. Önerilen çit, elektromanyetik girişimlere ve kasıtlıkarıştırmalara karşı frekans değiştirmeye imkân sağlayan geniş bant metamalzeme antenler kullanılarak oluşturulmuştur. Deneysel sonuçlara göre, önerilen çit sistemi hat boyunca veya ötesindeki hareketliliğitespit etme amacıyla kullanılabileceği öngörülmektedir.

Jamming insensitive frequency hopping metamaterial based electromagnetic fence application

The most well-known surveillance and perimeter protection systems used today count on person-centered services with conventional tools such as fences, walls and cameras. However, conventional techniquescannot always detect threats effectively. Moreover, fences using different sensors are weak for reaction timewhen an infiltration occurs. In order to provide sufficient response time to prevent a threat, we propose anelectromagnetic fence application based on software defined radio in the laboratory conditions. The fence isformed with two broadband metamaterial antennas which allow to change frequency against interferenceand intended jamming. According to the experimental results, it is predicted that the proposed fence systemcan be used to detect an activity beyond or along the perimeter.

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