International Journal RF Microwave Computer Aided Engineering, 29(4), 1–6 A compact wide-band antipodal Vivaldi antenna design. Compact antipodal vivaldi antenna for UWB applications. IET Microwaves, Antennas & Propagation, 11(6), 796–803
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Antipodal vivaldi antenna with improved radiation characteristics for civil engineering applications. Moosazadeh, M., kharkovsky, S., Joseph, T. Microwave sensors for breast cancer detection. IEEE Antennas and Wireless Propagation letters, 11, 1350–1353 UWB omnidirectional square monopole antenna for use in circular cylindrical microwave imaging systems. IEEE Antennas and Wireless Propagation Letters, 12, 380–383 Dual-polaried broadside thin dielectric resonator antenna for microwave imaging. IET Microwave Antennas Propagation, 9(11), 1173–1178 Design and performance analysis of the miniaturised water-filled double-ridged horn antenna for active microwave imaging applications. IEEE Transactions on Antennas and Propagation, 64(7), 3245–3250 Compact 3-D slot-loaded folded dipole antenna with unidirectional radiation and low impulse distortion for head imaging applications. Microwave breast phantom measurement system with compact side slotted directional antenna. IEEE Transactions of Antennas and Propagation, 63(8), 3531–3539 Optimization- based confocal microwave imaging in medical application. The imaging results suggest that CTVAD antenna is a suitable candidate to construct a device that can detect breast tumour.
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Then the image reconstruction algorithm is implemented with the help of MATLAB software to form the image of the backscattered energy. Furthermore, a 3-D breast model with a spherical tumour of size 5 mm is designed using the software CST microwave studio and it is illuminated by 2 × 10 proposed CTVAD antenna array and the backscattered signals are recorded.
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A unidirectional radiation pattern, flat group delay, system fidelity factor greater than 90% and FBR value more than 9 dB are achieved. The measured results show that the return loss is significantly improved in the frequency band (3.1 GHz–10.6 GHz). Compared with the other antennas, the proposed CTVAD is compact of size 48 mm × 45.7 mm and improves the impedance bandwidth with reduced sidelobe level. By adding the slots on the back wall offset and introducing the directors at the centre of the radiating aperture facilitate focusing the E field distribution to the centre of the aperture which in turn helps to achieve narrow beam width and high gain. A new Compact Ultra-Wideband Circularly Tapered Vivaldi Antenna with Director (CTVAD) for microwave-based breast tumour detection system is presented.