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

Year 2019, , 662 - 670, 15.09.2019

Ahmet Rıfat Görgün , Selçuk Çömlekçi , Adnan Kaya

https://doi.org/10.21923/jesd.533235

Abstract

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

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

Abstract

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.

Keywords

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

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