An antenna system includes: a first antenna element configured to transduce between second wireless energy and second transmission-line-conducted energy, wherein the first and second wireless energy are of first and second polarizations of the first antenna element and in first and second directions that are different and define a first plane; and a second antenna element configured to transduce between third wireless energy and third transmission-line-conducted energy and between fourth wireless energy and fourth transmission-line-conducted energy, wherein the third and fourth wireless energy are of first and second polarizations of the second antenna element and in third and fourth directions that are different and define a second plane that is substantially orthogonal to the first plane.