Antenna system

• US 9,653,816 B2
• Filed: 07/14/2014
• Issued: 05/16/2017
• Est. Priority Date: 07/14/2014
• Status: Active Grant

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Inventors: Ferreri, Arnold L., Dietz, Charles L., Knowles, Patrick J.
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): Alkassim, Jr., Ab Salam
• Application Number:
  US14/330,849
• Publication Number:
  US 20160013564A1
• Time in Patent Office: 1,037 Days
• Field of Search: 343893, 343872, 343753, 343705, 343706, 343708
• CPC Class Codes: H01Q 1/28 Adaptation for use in or on aircraft, missiles, satellites, or balloons
• CPC Class Codes: H01Q 1/282 Modifying the aerodynamic properties of the vehicle, e.g. projecting type aerials
• CPC Class Codes: H01Q 1/286 substantially flush mounted with the skin of the craft
• CPC Class Codes: H01Q 1/287 integrated in a wing or a stabiliser
• CPC Class Codes: H01Q 1/42 Housings not intimately mechanically associated with radiating elements, e.g. radome
• CPC Class Codes: H01Q 15/24 Polarising devices; Polarisation filters H01Q15/12, H01Q15/22 take precedence
• CPC Class Codes: H01Q 19/062 for focusing
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H01Q 25/005 providing two patterns of opposite direction; back to back antennas H01Q25/004 takes precedence

Abstract

An antenna system can include a first panel of radiators that extend from a vertex in a first substantially linear direction. The antenna system can also include a second panel of radiators extending from the vertex in a second substantially linear direction. The first panel of radiators and the second panel of radiators form an angle between about 1 degree and about 45 degrees to enhance gain.

Claims

1. An antenna system comprising:

a plurality of antenna arrays arranged circumferentially about an axis, wherein the antenna system has radial symmetry, each of the plurality of antenna arrays comprising;

a first panel of radiators extending from a vertex in a first substantially linear direction; and

a second panel of radiators extending from the vertex in a second substantially linear direction, wherein the first panel of radiators and the second panel of radiators form an angle between about 1 degree and about 45 degrees to enhance gain;

wherein the antenna system is configured to propagate a broadcast beam with a polar or elevation angle within a range of about 180 degrees and an azimuth angle within a range of about 360 degrees.

2. The antenna system of claim 1, wherein each of the first panel of radiators and the second panel of radiators are two-dimensional arrays comprising:

a given set of strips of radiators that are spaced apart from each other; and

another set of strips of radiators that are spaced apart from each other, wherein the given and the other set of strips of radiators are perpendicularly arranged.

3. The antenna system of claim 2, wherein the given and the other set of strips of radiators are parallel.

4. The antenna system of claim 1, wherein each radiator of the first panel of radiators and the second panel of radiators further comprises a drive point that is electrically coupled to a signal source.

5. The antenna system of claim 1, wherein the antenna system is configured to propagate an electromagnetic wave in any selected direction between a substantially vertical or elevation direction and a substantially horizontal or azimuth direction.

6. The antenna system of claim 5, wherein the antenna system has an effective aperture equal to about a sum of a length of the first panel of radiators and a length of the second panel of radiators.

7. The antenna system of claim 6, wherein antenna system is configured to stretch the effective aperture in an elevation plane of the antenna system.

8. The antenna system of claim 1, further comprising a housing that encases the first panel of radiators and the second panel of radiators.

9. The antenna system of claim 8, further comprising a transitional radiator positioned between the housing and the vertex, the transitional radiator being configured to focus energy radiated from the first panel of radiators and the second panel of radiators to enable parallel polarization of an electromagnetic field propagating from the first and second panels of radiators.

10. An antenna system comprising:

a plurality of wedge shaped antenna arrays, wherein each of the wedge shaped antenna arrays comprises;

a first two-dimensional panel of radiators extending from a vertex in a first substantially linear direction;

a second two-dimensional panel of radiators extending from the vertex in a second substantially linear direction, wherein the first two-dimensional panel of radiators and the second two-dimensional panel of radiators form an angle between about 1 degree and about 45 degrees; and

a transitional radiator positioned near the vertex, the transitional radiator being configured to focus energy radiated from the first two-dimensional panel of radiators and the second two-dimensional panel of radiators to enable parallel or horizontal polarization of an electromagnetic field propagating from the first and second panels of radiators;

wherein each of the first two-dimensional panel of radiators and the second two-dimensional panel of radiators comprise;

a given set of strips of radiators that are spaced apart from each other; and

another set of strips of radiators that are spaced apart from each other, wherein the given and the other set of strips of radiators are perpendicularly arranged; and

wherein the antenna system has an effective aperture equal to a combined length of the first and second two-dimensional panels of radiators.

11. The antenna system of claim 10, wherein the plurality of wedge shaped antenna arrays have radial symmetry.

12. The antenna system of claim 11, wherein the plurality of wedges in an azimuth direction are collimated to form an antenna with an increased gain.

13. The antenna system of claim 12, wherein the antenna system is configured to propagate a broadcast beam with a polar or elevation angle within a range of about 180 degrees and an azimuth angle within a range of about 360 degrees and the antenna system has a height equal to about one quarter of the effective aperture.

14. The antenna system of claim 10, further comprising a backplane configured to:

receive an input signal; and

provide the input signal to a subset of the plurality of wedge shaped antenna arrays.

15. An aircraft comprising the antenna system of claim 10 mounted thereon.

16. An antenna system comprising:

a plurality of wedge shaped antenna arrays arranged in a shape with radial symmetry, wherein each of the wedge shaped antenna arrays comprises;

a first two-dimensional panel of radiators extending from a vertex in a first substantially linear direction; and

a second two-dimensional panel of radiators extending from the vertex in a second substantially linear direction, wherein the first two-dimensional panel of radiators and the second two-dimensional panel of radiators form an angle between about 1 degree and about 45 degrees;

wherein the plurality of wedge shaped antenna arrays are arranged in one of a planar geometry a circular geometry and a cylindrical geometry; and

wherein the antenna system is configured to propagate a broadcast beam with a polar or elevation angle that within a range of about 180 degrees and an azimuth angle within a range of about 360 degrees, wherein 180 degrees of the plurality of wedge shaped antenna arrays are collimated together to form an antenna with an increased gain.

17. The antenna system of claim 16, wherein the antenna system has an effective aperture equal to about a sum of the areas of the first and the second two-dimensional panels of radiators of a given one of the plurality of wedge shaped antenna arrays.