Plate antenna with double crossed polarizations

Claim 2

A plate antenna module with double crossed polarizations, the radiating part of which comprises two similar thick element folded radiating doublets (1,3; 2,4) characterized by the fact that two doublets are located in a common plane in orthogonal relation to each other, and slots are defined of comparatively narrow width so as to operatively effect a common doublet gap between the driven elements of the doublets intersecting one another at the center (C) of the unit antenna.

Claim 3

A plate antenna module according to claim 1, characterized by the fact that the two unit doublets (1,3; 2,4) are respectively associated with central conductors (27, 30) for three-plate lines which are orthogonal with their extensions which cross one another beneath the center (C) of the antenna, with each three-plate line comprising the plates (1,3; 2,4) of a doublet and a reflector (31), and between the plates and the reflector, the central conductor (27 or 30), with the reflector (31) is common to the two doublets.

Claim 4

A plate antenna module according to claim 1 or 2, characterized by the fact that the two doublets are comprised of four plates (1 through 4) separated by a nonconductive cross (5 through 8) whose center coincides with the center (C) of the plate antenna module, with each end of an arm (5, 6, 7 or 8) of the cross ending in a first nonconductive area (11, 12, 13 or 14) defined on the outside by a conductive strip (16, 17, 18, or 19) connected to the rear parts of the two plates (1, 2, 3, or 4) adjacent to the said arm, a second finite nonconductive area (20, 21, 22 or 23) being provided beyond the conductive strip (16, 17, 18 or 19), with the first areas, the strips and the second areas being symmetrical with respect to the center (C) of the unit antenna and to the axes of symmetry (X-X', Y-Y') of the doublets.

Claim 5

A plate antenna module according to claim 3, characterized by the fact that it is constructed in the form of a first printed circuit (25) with a first metallized surface (24) from which the cross, the first areas and the second areas have been removed, and a second metallized surface (26) on which all that remains is the first central conductor (27) and a second printed circuit (28) with a first surface (29) on which all that remains is the second central conductor (30) and a second completely metallized surface (31) serving as a reflector, with the two printed circuits (24, 28), being superposed with an insulating layer (32) between them.

Claim 6

A plate antenna module according to claim 4 characterized by the fact that director elements (37 through 40) are placed in front of the plates (1 through 4) and separated from them by an insulating layer.

Claim 7

A plate antenna according to claim 5 characterized by the fact that each of the direction elements is formed from a long rectangular strip of material, with the four strips being oriented along the arms of a cross whose center coincides with the center of the antenna and whose orientation coincides with the axes of symmetry (X-X', Y-Y') of the plates of the doublets, respectively, with the origins of the conductive strips being located relatively near the center of the cross.

Claim 8

A plate antenna module according to claim 5 characterized by the fact that the ends of the director elements (37 through 40) which are the furthest from the center are located between the center and the outermost element defining said radiating part.

Claim 9

An array of plate antennas, characterized by the fact that it comprises plate antenna modules according to claim 7 and that the first central conductors (27) are all associated with the first doublets, and the second central conductors (30) are all associated with the second doublets.

Claim 10

A plate antenna module with double crossed polarizations, the radiating part of which comprises two thick element folded radiating doublets (1,3; 2,4), characterized by the fact that two doublets are located in a single plane and are orthogonal, with slots between the driven elements of the doublets crossing one another at the center (C) of the unit antenna; said two unit doublets (1,3; 2,4) are respectively associated with central conductors (27, 30) for three-plate lines which are orthogonal with their extensions which cross one another beneath the center (C) of the antenna, with each three-plate line comprising the plates (1,3; 2,4) of a doublet and a reflector (31), and between the plates and the reflector, the central conductor (27 or 30), with the reflector (31) is common to the two doublets; said two doublets being comprised of four plates (1 through 4) separated by nonconductive comparatively narrow cross slots (5 through 8) whose center coincides with the center (C) of the plate antenna module so as to render said slots operatively effective as a common doublet gap between said doublets, with each end of an arm (5, 6, 7 or 8) of the cross slots ending in a first nonconductive areas (11, 12, 13 or 14) defined relatively outward by a conductives strip (16, 17, 18, or 19) connected to the rear parts of the two plates (1, 2, 3, or 4) adjacent to the said arm, a second finite nonconductive area (20, 21, 22 or 23) being provided beyond the conductive strip (16, 17, 18 or 19), with the first areas, the strips and the second areas being symmetrical with respect to the center (C) of the unit antenna and to the axes of symmetry (X-X', Y-Y') of the doublets; and director elements (37 through 40) are positioned in front of the plates (1 through 4) and separated from them by an insulating layer.

Claim 11

A plate antenna module with double crossed polarizations, the radiating part of which comprises two thick element folded radiating doublets (1,3; 2,4), characterized by the fact that two doublets are located in a single plane and are orthogonal, with slots between the driven elements of the doublets crossing one another at the center (C) of the unit antenna; said two unit doublets (1,3; 2,4) are respectively associated with central conductors (27, 30) for three-plate lines which are orthogonal with their extensions which cross one another beneath the center (C) of the antenna, with each three-plate line comprising the plates (1,3; 2,4) of a doublet and a reflector (31), and between the plates and the reflector, the central conductor (27 or 30), with the reflector (31) is common to the two doublets; said two doublets being comprised of four plates (1 through 4) separated by nonconductive comparatively narrow cross slots (5 through 8) whose center coincides with the center (C) of the plate antenna module so as to render said slots operatively effective as a common doublet gap between said doublets, with each end of an arm (5, 6, 7 or 8) of the cross slots ending in a first nonconductive areas (11, 12, 13 or 14) defined relatively outward by a conductives strip (16, 17, 18, or 19) connected to the rear parts of the two plates (1, 2, 3, or 4) adjacent to the said arm, a second finite nonconductive area (20, 21, 22 or 23) being provided beyond the conductive strip (16, 17, 18 or 19), with the first areas, the strips and the second areas being symmetrical with respect to the center (C) of the unit antenna and to the axes of symmetry (X-X', Y-Y') of the doublets; and director elements (37 through 40) are positioned in front of the plates (1 through 4) and separated from them by an insulating layer.

Claim 12

A plate antenna module according to claim 9, characterized by the fact that it is constructed in the form of a first printed circuit (25) with a first metallized surface (24) from which the cross, the first areas and the second areas have been removed, and a second metallized surface (26) on which all that remains is the first central conductor (27) and a second printed circuit (28) with a first surface (29) on which all that remains is the second central conductor (30) and a second completely metallized surface (31) serving as a reflector, with the two printed circuits (24, 28), being superposed with an insulating layer between (32) them.

Claim 13

A plate antenna according to claim 10 characterized by the fact that each of the director elements is formed fom a long rectangular strip of material, with the four strips being oriented along the arms of a cross whose center coincides with the center of the antenna and whose orientation coincides with the axes of symmetry (X-X', Y-Y') of the plates of the doublets, respectively, with the origins of the conductive strips being located relatively near the center of the cross.

Claim 14

A plate antenna module according to claim 11 characterized by the fact that the ends of the director elements (37 through 40) which are the farthest from the center are located within the radiating structure of the antenna.

Claim 15

An array of plate antennas, characterized by the fact that it comprises plate antenna modules according to claims 9, 10, 11 or 12 and that the first central conductors (27) are all associated with the first doublets, and the second central conductors (30) are all associated with the second doublets.