Patent ID: 6703975
Filing Date: 2004-03-09
Classification: H01Q,H04B

Abstract:
A direction finding antenna array mounted on a perimeter portion of an airframe, comprising:a first antenna mounted to the airframe such that said first antenna has a first polarization that is perpendicular to a longitudinal axis of said airframe; a second antenna mounted to said airframe opposite from said first antenna such that said second antenna has a second polarization that is perpendicular to said longitudinal axis of said airframe, wherein said first and second antennas are log periodic folded slot antennas; a third antenna mounted to said airframe equidistant from said first and second antennas; and a fourth antenna mounted to said airframe opposite from said third antenna, said third and fourth antennas having third and fourth polarizations, respectively, that are perpendicular to said longitudinal axis of said airframe, wherein said third and fourth antennas are flared notch antennas.