Dual polarized ambidextrous multiple deformed aperture spiral antennas

Claim 2

An antenna group occupying a substantially circular area, comprising a plurality of spiral antenna disposed adjacent one another, radially symmetrically arranged about the centerpoint of the circular area, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed points in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said second end to a midpoint between each windings feed points is not less than 0.75 times the circumference of the circular area, the windings being arranged to yield a stable phase center located at said midpoint, wherein the windings of at lest one of the spiral antennas are generally Archimedean spirals in the vicinity of the feed points of the spiral antenna and generally logarithmic sprials in the vicinity of said second end of the spiral antenna.

Claim 3

An antenna group as in claim 1, wherein all the antennas are disposed co-planar with one another.

Claim 4

An antenna group as n claim 1, wherein the spiral antennas are of opposite configuration senses.

Claim 5

An antenna group as in claim 1, wherein all of the spiral antennas have the same configuration sense.

Claim 6

An antenna group as in claim 1, wherein one of the spiral antennas is an Archimedean spiral.

Claim 7

An antenna group as in claim 1, wherein one of the spiral antennas is a logarithmic spiral.

Claim 8

An antenna group as in claim 1, wherein at least a portion of at least one of the spiral antennas has a zig-zag configuration.

Claim 9

An antenna group having two separate symmetrically deformed spiral antennas, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, the windings of each antenna being arranged to yield a stable phase center located at a midpoint between each winding's feed point, said antennas being disposed adjacent and co-planar with one another within a circular area, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed point in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said seconded to said midpoint is not less than 0.75 times the circumference of the circular area, wherein the windings of at least one of the spiral antennas are generally Archimedean spirals in the vicinity of the feed points of the spiral antenna and logarithmic spirals in the vicinity of a second end of the spiral antenna remote from the feed points.

Claim 10

An antenna group having two separate symmetrically deformed spiral antennas, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, the windings of each antenna being arranged to yield a stable phase center located at a midpoint between each winding's feed point, said antennas being disposed adjacent and co-planar with one another within a circular area, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed point in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said seconded to said midpoint is not less than 0.75 times the circumference of the circular area, wherein the windings of at least one of the spiral antennas are generally Archimedean spirals in the vicinity of the feed points of the spiral antenna and logarithmic spirals in the vicinity of a second end of the spiral antenna remote from the feed points.

Claim 11

An antenna group as in claim 8, wherein the two spiral antennas have opposite configuration senses.

Claim 12

An antenna group as in claim 8, wherein the two spiral antennas have the same configuration sense.

Claim 13

An antenna group as in claim 8, wherein each antenna occupies about half the area defined by the circular area.

Claim 14

An antenna group as in claim 8, wherein the two spiral antennas are mounted on a planar support.

Claim 15

An antenna group as in claim 12, further comprising a third antenna disposed on the planar support.

Claim 16

An antenna group as in claim 8, wherein one of the spiral antennas is an Archimedean spiral.

Claim 17

An antenna group as in claim 8, wherein one of the spiral antennas is a logarithmic spiral.

Claim 18

An antenna group occupying a substantially circular area, comprising a plurality of spiral antennas disposed adjacent to one another, radially symmetrically arranged abut the center point of the circular area, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed point in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said second end to a midpoint between each winding's feed points is not less than 0.75 times the circumference of the circular area, at least one of the spiral antennas being a generally Archimedean spiral in the vicinity of the feed points of the spiral antenna and a generally logarithmic spiral in the vicinity of a second end of the spiral antenna remote from the feed points, said pair of windings of each antenna being arranged to yield a stable phase center located at said midpoint.

Claim 19

An antenna group occupying a substantially circular area, comprising a plurality of spiral antennas disposed adjacent to one another, radially symmetrically arranged abut the center point of the circular area, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed point in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said second end to a midpoint between each winding's feed points is not less than 0.75 times the circumference of the circular area, at least one of the spiral antennas being a generally Archimedean spiral in the vicinity of the feed points of the spiral antenna and a generally logarithmic spiral in the vicinity of a second end of the spiral antenna remote from the feed points, said pair of windings of each antenna being arranged to yield a stable phase center located at said midpoint.

Claim 20

An antenna group having two separate symmetrically deformed spiral antennas, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, the windings of each antenna being arranged to yield a stable phase center located at a midpoint between each winding's feed point, said antennas being disposed within a circular outline, one of the antennas being disposed in a plane different from the plane of the other antenna, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed points in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said second end to said midpoint is not less than 0.75 times the circumference of the circular area, wherein the windings of at least one of the spiral antennas are generally Archimedean spirals in the vicinity of the feed points of the spiral antenna and logarithmic spirals in the vicinity of a second end of the spiral antenna remote from the feed points.

Claim 21

An antenna group having two separate symmetrically deformed spiral antennas, each spiral antenna comprising a pair of windings arranged in a spaced, interleaved configuration, each winding having a feed point at a first end of the spiral antenna, the windings of each antenna being arranged to yield a stable phase center located at a midpoint between each winding's feed point, said antennas being disposed within a circular outline, one of the antennas being disposed in a plane different from the plane of the other antenna, each spiral antenna being symmetrically deformed to occupy the area within a sector of the circular area such that the length of each winding of each antenna measured from a second end of the spiral antenna remote from the feed points in a direction along said winding from said second end toward said first end to the point where the winding first intersects a radius extending from said second end to said midpoint is not less than 0.75 times the circumference of the circular area, wherein the windings of at least one of the spiral antennas are generally Archimedean spirals in the vicinity of the feed points of the spiral antenna and logarithmic spirals in the vicinity of a second end of the spiral antenna remote from the feed points.