UWB Modified Elliptical Antipodal Vivaldi antenna array fed with four stage Wilkinson Power Divider

In this paper, an UWB array that is constructed from two elements of a newly modified broadband Elliptical Antipodal Vivaldi Antenna (EAVA) is presented and four-stage Wilkinson power divider as the feeding network. The array is developed to provide a high gain array that can be used in reflection measurement characterization of dielectric materials over a wide frequency range. In order to achieve an acceptable array performance across the wide band frequency (0.7-10 GHz), a fixture was designed to manually adjust physical spacing between the elements. The performances of the array element, the power divider and the antenna array system are measured and have proven an acceptable performance in the desired band.