US Patent 8350773 Ultra-wideband antenna element and array

An antenna element for fabricating into a linear or planar array includes a tapered slot along a main axis of the antenna element body that extends from a first slot end, defined by an outwardly flared opening at a second end of the antenna element, into a second meandering portion that is offset from the main axis, and then into a second slot end having a bend with respect to the main axis, and finally into a slot-line cavity proximate to the first end of the antenna element body. A feed port extends into the antenna element body from the outer surface of the first end of the antenna element body into the second slot end bend adjacent the slot-line cavity.