Patent ID: 6956528
Filing Date: 2005-10-18
Classification: H01Q

Abstract:
1. A broadband dual-polarized microstrip array antenna generating two polarizations by using a transmission path, comprising: a first film coated with metal on an upper side and a plurality of patch elements arranged with a uniform array shape; a closed region formed in the center of said first film; a patch antenna formed in the center of said closed region, said catch antenna generating radiation by resonance in said closed region; a first styrofoam formed under said first film; a second film forming a proximity feeding excitation transmission line, said second film formed under said first styrofoam and connected in parallel to a bottom side of said first film excepting said closed region, said second film generating a first polarization by exciting each patch antenna in accordance with input current; a second styrofoam formed under said second film; a third film under said second styrofoam, wherein a slot is formed at a position corresponding to each patch antenna for electro-magnetic waves to pass through; a third styrofoam formed under said third film; a fourth film formed under said third styrofoam, wherein transmission lines for aperture feeding excitation are formed on said fourth film and are connected in parallel to each other and generate a second polarization by exciting each catch antenna through said slot in accordance with the input current; a fourth styrofoam formed under said fourth film; and a thin metal plate formed under said fourth styrofoam, wherein said two polarizations are generated by a separate transmission path respectively using a parallel feeding method in order to reduce interference between said two polarizations.