Dual-polarization planar antenna

A dual-polarization planar antenna comprising:

• a first feeding substrate having a plurality of first radiation patch elements for radiating a plurality of circularly polarized waves and a first feeding line, wherein each of said first radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said first feeding line;
• a first dielectric member;
• a first ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• a second dielectric member;
• a second feeding substrate having a plurality of second radiation patch elements, which correspond in position to said plurality of first radiation patch elements and said plurality of slots, for radiating a plurality of circularly polarized waves and a second feeding line, wherein each of said second radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said second feeding line;
• a third dielectric member;
• and
• a second ground conductor;
• wherein said first feeding substrate, said first dielectric member, said first ground conductor, said second dielectric member, said second feeding substrate, said third dielectric member, and said second ground conductor are successively superposed in a direction from a top to a bottom of said dual-polarization planar antenna;
• wherein said first feeding substrate, said first ground conductor, and said second feeding substrate are arranged so that said first radiation patch elements, said slots which correspond and said second radiation patch elements which correspond overlap with one another;
• wherein respective pairs of said first and said second radiation patch elements are electromagnetically coupled to one another through said slots which correspond, respectively, each of said respective pairs being defined by one of said first radiation patch elements and one of said second radiation patch elements;
• wherein said first and said second feeding substrates are formed so that said first and second radiation patch elements are oriented for radiating oppositely circularly polarized waves, whereby both clockwise and counterclockwise polarizations are radiated;
• wherein dimensions of each of said first radiation patch elements are substantially equal to one another, dimensions of each of said second radiation patch elements are substantially equal to one another, and said dimensions of each of said first radiation patch elements are different from said dimensions of each of said second radiation patch elements.

A dual-polarization planar antenna comprising:

• a first feeding substrate having a plurality of first radiation patch elements and a first feeding line, wherein each of said first radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said first feeding line;
• a first dielectric member;
• a first ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• a second dielectric member;
• a second feeding substrate having a plurality of second radiation patch elements which correspond in position to said plurality of first radiation patch elements and said plurality of slots, and a second feeding line, wherein each of said second radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said second feeding line;
• a third dielectric member;
• a second ground conductor;
• a fourth dielectric member;
• and
• a third ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• wherein said third ground conductor, said fourth dielectric member, said first feeding substrate, said first dielectric member, said first ground conductor, said second dielectric member, said second feeding substrate, said third dielectric member, and said second ground conductor are successively superposed in a direction from a top to a bottom of said dual-polarization planar antenna;
• wherein said third ground conductor, said first feeding substrate, said first ground conductor, and said second feeding substrate are arranged so that said first radiation patch elements, said slots which correspond of said third and said first ground conductors, and said second radiation patch elements which correspond overlap with one another;
• wherein respective pairs of said first and said second radiation patch elements are electromagnetically coupled to one another through said slots which correspond, respectively, each of said respective pairs being defined by one of said first radiation patch elements and one of said second radiation patch elements;
• wherein said first and said second feeding substrates are arranged so that said first radiation patch elements are excited by said first feeding line in a first excitation direction while said second radiation patch elements are excited by said second feeding line in a second excitation direction perpendicular to said first excitation direction, whereby both vertical and horizontal polarizations are radiated.

A dual-polarization planar antenna comprising:

• a first feeding substrate having a plurality of first radiation patch elements for radiating a plurality of circularly polarized waves and a first feeding line, wherein each of said first radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said first feeding line;
• a first dielectric member;
• a first ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• a second dielectric member;
• a second feeding substrate having a plurality of second radiation patch elements, which correspond in position to said plurality of first radiation patch elements and said plurality of slots, for radiating a plurality of circularly polarized waves and a second feeding line, wherein each of said second radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said second feeding line;
• a third dielectric member;
• and
• a second ground conductor;
• wherein said first feeding substrate, said first dielectric member, said first ground conductor, said second dielectric member, said second feeding substrate, said third dielectric member, and said second ground conductor are successively superposed in a direction from a top to a bottom of said dual-polarization planar antenna;
• wherein said first feeding substrate, said first ground conductor, and said second feeding substrate are arranged so that said first radiation patch elements, said slots which correspond and said second radiation patch elements which correspond overlap with one another;
• wherein respective pairs of said first and said second radiation patch elements are electromagnetically coupled to one another through said slots which correspond, respectively, each of said respective pairs being defined by one of said first radiation patch elements and one of said second radiation patch elements;
• wherein said first and said second feeding substrates are formed so that said first and second radiation patch elements are oriented for radiating oppositely circularly polarized waves whereby both clockwise and counterclockwise polarizations are radiated;
• and
• wherein dimensions of each of said first radiation patch elements are substantially equal to one another, and dimensions of each of said second radiation patch elements are substantially equal to one another.

A dual polarization planar antenna comprising:

• a first feeding substrate having a plurality of first radiation patch elements and a first feeding line, wherein each of said first radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said first feeding line;
• a first dielectric member;
• a first ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• a second dielectric member;
• a second feeding substrate having a plurality of second radiation patch elements which correspond in position to said plurality of first radiation elements and said plurality of slots, and a second feeding line, wherein each of said second radiation patch elements comprises a width dimension which is substantially greater than a width dimension of said second feeding line;
• a third dielectric member;
• a second ground conductor;
• and
• a third ground conductor having a plurality of slots which correspond in position to said plurality of first radiation patch elements;
• wherein said third ground conductor, said first feeding substrate, said first dielectric member, said first ground conductor, said second dielectric member, said second feeding substrate, said third dielectric member, and said second ground conductor are successively superposed in a direction from a top to a bottom of said dual-polarization planar antenna;
• wherein said third ground conductor, said first feeding substrate, said first ground conductor, and said second feeding substrate are arranged so that said slots of said third conductor which correspond said first radiation patch elements, said slots of said first ground conductor which correspond and said second radiation patch elements which correspond overlap with one another;
• wherein said first and said second feeding substrates are arranged so that said first radiation patch elements are excited by said first feeding line in a first excitation direction while said second radiation patch elements are excited by said second feeding line in a second excitation direction perpendicular to said first excitation direction, whereby both vertical and horizontal polarizations are radiated;
• and
• wherein each of said plurality of slots of said third ground conductor has a shield portion formed at a position directly above said first feeding line and each slot of said first ground conductor comprises a shield portion formed at a position directly above said second feeding line.