A compact metamaterial UWB power-divider fed wide-band array antenna

In the development of a wide-band antenna, its radiator has become smaller by using slots and pins in a confined area, but the size of the antenna has not been effectively reduced in terms of the antenna system, because the conventional feeding structure is still used. When an array antenna is in need, as the feeding structure should have the power divider, the design becomes no more simple, and the size increases with the antenna feed.