Balanced Antipodal Vivaldi Antenna for Breast Cancer Detection

A new ultra-wideband antenna for tissue sensing adaptive radar system is presented in this paper. The antenna is based on a balanced antipodal Vivaldi design. The measurements showed that the antenna has better that -10 dB return loss above 2.4 GHz. Simulation indicated that the antennas is capable of sending very short pulses with fidelity above 0.96 at a distance of 20 mm and up to 0.994 further away from the antenna aperture. 70% of the accepted energy is radiated in the endfire direction with a beamwidth of 34 mm by 44 mm on a plane 20 mm away.