An Antipodal Vivaldi Antenna Design for Torso Imaging in a Coupling Medium

An antipodal Vivaldi antenna designed to operate in a coupling medium with a relative dielectric constant of εr = 25 for microwave imaging of torso is presented in this paper. The proposed antenna is similar to the conventional antipodal Vivaldi antenna but with optimized parameters to radiate in the desired coupling medium. The antenna has a size of 120×70 mm2 and operating over 230-1000 MHz freq...