الفهرس 
Chapter 1Only 14 pages are availabe for public view
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Abstract
This thesis presents the design, simulation, and fabrication of an ultra-wideband (UWB) antenna for safe microwave imaging of breast tumor. The antenna consists of a sunflower-shaped patch and a partially slotted ground. It is designed with dimensions of 32×25 mm2 using a Roger-RT/4003 substrate material with a relative permittivity of 𝜀𝑟=4.3 and a thickness of 0.81 mm. Antenna performance is validated through simulation and fabrication measurements. The proposed antenna operates within a frequency range extending from 3.3 GHz to 11.2 GHz, and it is specifically designed for breast tumor imaging. The S11 parameter is measured at 81 different positions using a monostatic system to evaluate its performance. Measurements are conducted with and without a tumor, utilizing a rectangular breast phantom comprising a skin layer and a fat layer to replicate realistic tissue composition. The acquired data is processed using a confocal microwave imaging algorithm that enables the generation of breast images that effectively indicate tumor. CST software and MATLAB are used to achieve the proposed design and simulation. The specific absorption rate (SAR) is monitored throughout imaging to ensure safety. At 6.9 GHz, the maximum SAR calculation is 0.88 W/kg; at 9.32 GHz, it is measured at 0.726 W/kg, both well below the standard limit. A comparison between the proposed antenna and the literature has been conducted. The proposed design exhibits novelty, considering its compact design, efficient performance, simplicity, and capability for safe and accurate imaging