Simultaneous mode matching feedline

A simultaneously matched mode antenna fecdline comprising:

• a tapered common member;
• a plurality of coaxial cables, 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 by conductors;
• and
• a transition section wherein said coaxial cables are arranged in a circular cluster around said tapered common member and 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.

A simultaneously matched mode antenna feedline comprising:

• a substrate configured in a shape at least partially surrounding a volume;
• a plurality of electrically conductive strips provided on said substrate, each said strip extending parallel to said other strips between an input end thereof and an output end thereof;
• and
• a ground plane provided on said substrate, said ground plane being configured to transition said strips from a decoupled state proximal to said input ends thereof to a coupled state proximal to said output ends thereof.

A simultaneously matched mode antenna feedline comprising:

• a substrate configured in a shape at least partially surrounding a volume;
• a plurality of electrically conductive strips provided on said substrate, each said strip extending parallel to said other strips between an input end thereof and an output end thereof;
• and
• at least one ground member disposed within said volume, said ground member being shaped to transition said strips from a decoupled state proximal to said input ends thereof to a coupled state proximal to said output ends thereof.

A simultaneously matched mode antenna feedline comprising:

• a conically shaped electrically conductive member having a plurality of holes extending from a base of said conically shaped electrically conductive member therethrough parallel with a central axis of said conically shaped electrically conductive member;
• a plurality of coaxial cables, 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, said sections of said plurality of coaxial cables from which said outer conductors are removed being received in said holes in said conically shaped electrically conductive member.