  In this paper, a compact dual-polarized Vivaldi antenna is presented. Four
Vivaldi elements are used as radiators, and are positioned obliquely and
connected in a horn shape. By exciting two sets of elements, two orthogonally
polarized radiations can be achieved. The dual-polarized antenna features a low
operating frequency band with a wide bandwidth, high port isolation, good
directional radiation performance, and a very compact size, making it highly
suitable for the ground penetrating radar (GPR) application.
