Selçuk ÇÖMLEKÇİ, Ahmet Rıfat GÖRGÜN, Adnan KAYA

MİKRODALGA TÜMÖR ABLASYONU İÇİN HÜZME YÖNLÜLÜĞÜ YÜKSEK KOMPAKT ANTEN VE KOMPAKT ÇOK BANDLI DÜZLEMSEL ANTEN TASARIMI VE ANALİZİ

Mikrodalga ablasyonu (MDA) kanserli dokuları mikrodalga enerjisini kullanarak yok etme tekniği olarak bilinmektedir. İmplant antenler mikrodalga ablasyonu (MDA) için uygun antenler olup, küçük yapıları ve düşük maliyetleri ile tercih edilmektedir. Kanserli dokunun gelişimini etkin bir şekilde baskılayabilmek için, özgül soğrulma oranı (ÖSO) ve sıcaklık dağılımı kontrol edilebilen bu tip antenler değişik frekans ve güçlerde kullanılmaktadır. Bu çalışmada mikrodalga tümör ablasyonu için CST Studio ile tasarlanan ve 2.41 GHz de rezonans durumunda olan hüzme yönlülüğü yüksek kompakt anten ve 2.46 GHz’ de rezonans durumunda olan kompakt çok bandlı düzlemsel anten kullanıldı. Bu radyatör tip antenler 2.45 GHz’ de tümörlü doku karşısına yerleştirilerek simule edildi. Hüzme yönlülüğü yüksek kompak anten için 2.41 GHz de yaptığı ışıma sonucunda maksimum SAR değeri 8.53 W/kg SAR/10g olarak elde edildi ve ısı akışı 1 W için sıcaklık aralığı 37 –48℃ olarak elde edildi. Kompakt çok bandlı düzlemsel anten için 2.45 GHz de yaptığı ışıma sonucunda maksimum SAR değeri 22.5 W/kg SAR/10g olarak elde edildi ve ısı akışı 1 W için sıcaklık aralığı 36 –41℃ olarak elde edildi. Antenlerin analizi ile ilgili olarak Geri dönüş kaybı (S11), elektrik alan, yönlendiricilik ve SAR değerleri ile simulasyonda mikrodalga gücünün uygulanmasıyla bir eğri buyunca elde edilen sıcaklık – uzaklık grafikleri simulasyon sonucu olarak rapor edilmiş ve sonuçlar yorumlanmıştır. Elde edilen simulasyon sonuçlarına göre her iki anteninde mikrodalga ablasyonunda kullanılabileceğine dair sonuçlar elde edilmiştir.

Anahtar Kelimeler:

Ablasyon, Mikrodalga ısıtma, Özgül soğrulma oranı (ÖSO), Radyatör anten

BEAM DIRECTION HIGH COMPACT ANTENNA AND COMPACT MULTIBAND PLANAR ANTENNA DESIGN AND ANALYSIS FOR MICROWAVE TUMOR ABLATION

Microwave ablation (MWA) is known as the technique of destroying cancerous tissues using microwave energy. Implant antennas are suitable antennas for microwave ablation (MWA) and are preferred for small structures and low costs. In order to effectively suppress the development of cancerous tissue, this type of antenna can be controlled with specific absorption rate (SAR) and temperature distribution. In this study beam direction high compact antenna resonance at 2.41 GHz and compact multiband planar antenna resonance at 2.46 GHz were designed with CST Studio for microwave tumor ablation. These radiator type antennas were simulated by placing them on a tumor tissue at 2.45 GHz. As a result of the radiation at 2.41 GHz for the beam directional high compact antenna, the maximum SAR value was obtained as 8.53 W/kg SAR/10g and the temperature range for heat flow 1 W was obtained as 37 –48℃ For a compact multi-band planar antenna at 2.45 GHz, the maximum SAR value was obtained as 22.5 W / kg SAR / 10 g and the temperature range for heat flow 1 W was obtained as 37 –48℃. With respect to the analysis of antennas, return loss (S11), electric field, directivity and SAR values and temperature - distance graph obtained as a result of the application of microwave power in simulation, were reported as a result of simulation and the results were interpreted.

Keywords:

Ablation, Microwave heating, Spesific absorption rate (SAR), Radiator antenna,

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