An antenna assembly includes a first flare arm, a second flare arm located adjacent to the first flare arm, a feed block having an opening therein, a feed slot extending from the opening to an outer periphery of the feed block, and a feed line integral with the feed block as a contiguous unitary component. The first flare arm and the second flare arm are symmetric about the feed block. The feed line can have a first portion integrated into the feed block and a second portion at least partially extending across the feed slot. A method of fabricating an antenna assembly includes additively manufacturing a feed block having a feed slot adjacent to a first flare arm and a second flare arm, and additively manufacturing a feed line having a first portion integral with the feed block, and a second portion at least partially extending across the feed slot.