Patent ID: 6856300

Claim:
A feed network for an array of antenna elements, where the array elements are disposed in a plurality of columns, the feed network comprising: a plurality of feed points; for each of at least some of the plurality of feed points: a first primary feed line extending from said feed point to a first primary intersection point, and a second primary feed line extending from said feed point to a second primary intersection point, the second primary feed line having a length different than a length of the first primary feed line to provide a first phase shift in the second primary feed line relative to the first primary feed line; for each of the respective first and second primary intersection points: a first secondary feed line extending from said respective primary intersection points to a respective first secondary intersection point, and a second secondary feed line extending from said respective primary intersection points to a respective second secondary intersection point, the second secondary feed line having a length substantially equal to a length of the first secondary feed line; and, for each of the respective first and second secondary intersection points: a first element feed line extending from said respective secondary intersection points to a respective first antenna element, and a second element feed line extending from said respective secondary intersection points to a respective second antenna element, the second element feed lines having a length different than a length of the first element feed lines to provide a second phase shift in the second element feed line relative to the first element feed line, where an orientation of the antenna element associated with the first element feed lines is rotated with respect to an orientation of the antenna element associated with the second element feed lines to provide a third phase shift between the antenna element connected to the second element feed lines and the antenna element connected to the first element feed lines.