Özet:

Breast cancer is the second in the causes of death ranks after cardiovascular diseases around the world. Early stage cancer detection is the most important in terms of reproducing of the malignant cells in an uncontrolled way and spreading to the other tissues. Microwave imaging is relatively easier compared to other types which are X-ray mammography, Magnetic resonance imaging (MRI) and ultrasound. They have some disadvantages. For example; Xray mammography suffers from high missed-detection and false-detection rates. Also, it is ionizing and uncomfortable compression of the breast. Because of this, microwave imaging has the potential to overcome the some disadvantages of the X-ray mammography, MRI, and other existing known methods. In addition, Ultrawide band (UWB) radar technique is a quite attractive technology for many applications, especially for early breast cancer detection. In this paper, both an UWB Bow-tie antenna with enhanced bandwidth and a 3D breast structure which has different permittivity and conductivity is modelled in CST software simulation tool to solve electromagnetic field values. Besides, The Federal Communications Commission (FCC) allowed frequency bandwidth of 3.1 to 10.6 GHz for this aim. Return loss, VSWR, and radiation pattern characteristics which are significant antenna parameters are simulated and obtained whether the antenna possess an efficient characteristic or not. Also, electric field values over the breast tissue with tumor and without tumor are evaluated

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