A Modified Compact Flexible Vivaldi Antenna Array Design for Microwave Breast Cancer Detection

In this paper, a compact, flexible Vivaldi antenna is designed, and an array of nine identical antennas type used as microwave breast imaging model to detect cancerous tumors in the multilayers phantom presented paper. The nine-antenna measure backscattering signal phantom, where one acts transmitter other eight act receivers scattered signals. Then, second receivers, so on till we have gone through all antennas. These collected backscattered signals are reconstruct image using software called “Microwave Radar-based Imaging Toolbox (MERIT)”. From reconstructed image, tumor inside can be identified located. Different sizes different locations tested, it found that determined irrespective size. proposed modified has very compact size 25 × 20 0.1 mm3 geometry compared with conventional first version two resonant frequencies at 4 9.4 GHz, because interested more band, gives us sufficient resolution, notched frequency by etching slots ground plane adding rectangular parasitic elements radiating side antenna. This technique utilized block and, result, bandwidth enhanced 20% design bandwidth. fabricated Polyimide material mm thick dielectric constant 3.5 standard PCB manufacturing process. measured performance simulated results commercially available simulation Ansoft HFSS, good agreement.