Compact Ultra-Wideband Arch-Shaped Wide-Slot Antenna with High Fidelity Factor and Bandwidth Enhancement for Microwave Imaging of Breast Cancer

A new compact Ultra-Wide Band (UWB) arch shaped wide-slot antenna has been implemented for Microwave Imaging (MI) of breast cancer. It includes a fork-shaped strip and an arched slot ground, has a compact size of ۱۶×۲۰mm with a height of ۱mm. The arched slot in the ground plate enhances the impedance bandwidth and the gain of the antenna. It has a bandwidth of ۳.۷ GHz to ۱۸ GHz, that covers WLAN (۵.۴ GHz), X band (۸-۱۲ GHz), and Ku band (۱۲-۱۸ GHz) and having gain of ۲.۷ dBi to ۶.۳ dBi in the frequency ranges. The fidelity factor was computed for both E-plane and H-plane scenarios, indicating range of ۰.۹۲۲ to ۰.۹۷۵ for the E-plane across all angles. It has a small size, simple design, less signal distortion, a high gain of ۶.۳ dBi, the fractional bandwidth percentage of ۱۳۱%. and efficiency of ۹۳.۷% at ۶ GHz. It has reliable performances in terms of the fidelity factor at all angles compared to the most recent works. A microwave imaging simulation for breast tumor detection is performed to detect changes in the backscattering signal in the presence or absence of a tumor with a high dielectric inclusion. S۱۱ is quite high when measured in front of the breast model and a noticeable difference in S۲۱ exists between the scenarios with and without a tumor in the breast model. A significant variation in the transmission parameter exists across the entire frequency range, the scenarios with and without the presence of the tumor.

کلیدواژه ها:

Ultra-wideband antenna ، Microwave Imaging ، Arch shaped ، Wide-slot ، Fidelity factor