Patent ID: 6549175
Filing Date: 2003-04-15
Classification: H01Q

Abstract:
A simultaneously matched mode antenna feedline comprising:a plurality of coaxial cables equal in number to a number of antenna elements to be fed by said feedline, each said coaxial cable extending between an input end thereof and an output end thereof and including an inner conductor shielded proximal to said input end thereof by an outer conductor and a dielectric layer between said inner and outer conductors; and a transition section comprising a section of each said coaxial cable between said input and output ends thereof wherein said outer conductor of each said coaxial cable is removed therefrom in a tapered manner proceeding from proximal to said input end thereof towards said output end thereof with said outer conductor being completely removed prior to said output end, thereby transitioning said coaxial cables from decoupled fixed impedance transmission lines proximal to said input ends thereof to a coupled modal dependent multi-transmission line proximal to said output ends thereof.