Patent ID: 6801789
Filing Date: 2004-10-05
Classification: H01Q

Abstract:
A multiple-beam antenna receiving radio waves from a plurality of satellites by one down converter mounted on a parabolic reflector and switching respective input signals by a signal selected by a tuner for output, said down converter including:a plurality of waveguides for receiving the radio waves from said plurality of satellites at an opening and converting them to linearly polarized waves; a feeding portion inserted to each of said waveguides and having one end bent at a prescribed angle for adjusting polarization displacement, wherein said satellite uses a linearly polarized wave, and said feeding portion includes feeding portions for horizontally and vertically polarized waves, wherein said waveguide includes a vertical hole for insertion of said feeding portion for said vertically polarized wave, and a horizontal hole for insertion of said feeding portion for horizontally polarized wave, said feeding portion for vertically polarized wave has an end inserted to said vertical hole of said waveguide and bent to have an angle for adjustment with respect to the vertical direction, and said feeding portion for horizontally polarized wave has an end inserted to said vertical hole of said waveguide and bent to have an angle for adjustment with respect to the horizontal direction.