Phased array antenna providing rapid beam shaping and related methods

• US 6,522,294 B2
• Filed: 11/09/2001
• Issued: 02/18/2003
• Est. Priority Date: 12/12/2000
• Status: Expired due to Fees

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Vail, David Kenyon, Tabor, Frank J., Blom, Daniel P., Wilson, Stephen S.
• Primary Examiner(s): Blum, Theodore M.
• Application Number:
  US09/991,547
• Publication Number:
  US 20020070895A1
• Time in Patent Office: 466 Days
• Field of Search: 342/372, 342/368, 342/157, 342/158
• US Class Current: 342/372
• CPC Class Codes: H01Q 1/02 Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H01Q 3/36 with variable phase-shifters

Abstract

A phased array antenna may include a substrate, a plurality of phased array antenna elements carried by the substrate, and a central controller for providing beam steering commands and beam shaping commands. Furthermore, the phased array antenna may also include a plurality of element controllers connected to the phased array antenna elements and the central controller. Each element controller may store at least one position related value based upon physical positioning of the associated phased array antenna element on the substrate, and determine a beam shaping offset based upon the stored at least one position related value and a received beam shaping command from the central controller. Each element controller may also determine at least one phased array antenna element control value based upon a received beam steering command and the beam shaping offset.

Claims

1. A phased array antenna comprising:

a substrate and a plurality of phased array antenna elements carried by said substrate;

a central controller for providing beam steering commands and beam shaping commands; and

a plurality of element controllers connected to said phased array antenna elements and said central controller, each element controller

storing at least one position related value based upon physical positioning of the associated phased array antenna element on said substrate,

determining a beam shaping offset based upon the stored at least one position related value and a received beam shaping command from said central controller, and

determining at least one phased array antenna element control value based upon a received beam steering command and the beam shaping offset.

2. The phased array antenna according to claim 1 wherein said plurality of phased array elements are arranged in a predetermined pattern about a phase center;

and wherein the at least one position related value is based upon physical positioning relative to the phase center.

3. The phased array antenna according to claim 1 wherein said central controller provides common beam shaping commands to all of said element controllers.

4. The phased array antenna according to claim 3 wherein each common beam shaping command comprises a plurality of common beam shaping coefficients;

wherein the at least one position related value comprises a plurality of position related coefficients; and

wherein each element controller determines the beam shaping offset based upon multiplications of the position related coefficients and the common beam shaping coefficients.

5. The phased array antenna according to claim 4 wherein each element controller further performs at least one accumulation.

6. The phased array antenna according to claim 1 wherein each element controller stores as the at least one position related value a plurality of beam shaping offsets for respective different beam shapes;

and wherein each element controller determines as the beam shaping offset one of the plurality of stored beam shaping offsets based upon receiving a corresponding beam shaping command therefor.

7. The phased array antenna according to claim 1 wherein said central controller provides the at least one position related value for storing in each element controller.

8. The phased array antenna according to claim 1 wherein said central controller determines the at least one position related value for storing in each element controller.

9. The phased array antenna according to claim 1 wherein each element controller comprises at least one register for storing the at least one position related value.

10. The phased array antenna according to claim 1 wherein the at least one phased array antenna element control value comprises at least one of a phase and attenuation value.

11. A phased array antenna comprising:

a substrate and a plurality of phased array antenna elements carried by said substrate;

a central controller for providing beam steering commands and common beam shaping commands, each common beam shaping command comprising a plurality of common beam shaping coefficients; and

a plurality of element controllers connected to said phased array antenna elements and said central controller, each element controller

storing a plurality of position related coefficients based upon physical positioning of the associated phased array antenna element on said substrate,

determining a beam shaping offset based upon multiplication of the position related coefficients and received common beam shaping coefficients from said central controller, and

determining at least one phased array antenna element control value based upon a received beam steering command and the beam shaping offset.

12. The phased array antenna according to claim 11 wherein said plurality of phased array elements are arranged in a predetermined pattern about a phase center;

and wherein the position related coefficients are based upon physical positioning relative to the phase center.

13. The phased array antenna according to claim 11 wherein each element controller further performs at least one accumulation.

14. The phased array antenna according to claim 11 wherein said central controller provides the plurality of position related coefficients for storing in each element controller.

15. The phased array antenna according to claim 11 wherein said central controller determines the plurality of position related coefficients for storing in each element controller.

16. The phased array antenna according to claim 11 wherein each element controller comprises a plurality of registers for storing the plurality of position related coefficients.

17. The phased array antenna according to claim 11 wherein the at least one phased array antenna element control value comprises at least one of a phase and attenuation value.

19. The phased array antenna according to claim 11 wherein said plurality of phased array elements are arranged in a predetermined pattern about a phase center;

and wherein the plurality of beam shaping offsets are based upon physical positioning relative to the phase center.

20. The phased array antenna according to claim 11 wherein said central controller provides common beam shaping commands to all of said element controllers.

21. The phased array antenna according to claim 11 wherein said central controller provides the plurality of beam shaping offsets for storing in each element controller.

22. The phased array antenna according to claim 11 wherein said central controller determines the plurality of beam shaping offsets for storing in each element controller.

23. The phased array antenna according to claim 11 wherein each element controller comprises a plurality of registers for storing the plurality of beam shaping offsets.

24. The phased array antenna according to claim 11 wherein the at least one phased array antenna element control value comprises at least one of a phase and attenuation value.

18. A phased array antenna comprising:

a substrate and a plurality of phased array antenna elements carried by said substrate;

a central controller for providing beam steering commands and beam shaping commands; and

a plurality of element controllers connected to said phased array antenna elements and said central controller, each element controller

storing a plurality of beam shaping offsets for respective different beam shapes and based upon physical positioning of the associated phased array antenna element on said substrate,

determining a selected beam shaping offset based upon the stored plurality of beam shaping offsets and a received beam shaping command from said central controller, and

determining at least one phased array antenna element control value based upon a received beam steering command and the selected beam shaping offset.

25. A method for operating a phased array antenna of a type comprising a substrate and a plurality of phased array antenna elements carried by the substrate, a central controller for providing beam steering commands and beam shaping commands, and a plurality of element controllers connected to the phased array antenna elements and the central controller, the method comprising:

storing, at each element controller, at least one position related value based upon physical positioning of the associated phased array antenna element on the substrate;

determining, at each element controller, a beam shaping offset based upon the stored at least one position related value and a received beam shaping command from the central controller; and

determining, at each element controller, at least one phased array antenna element control value based upon a received beam steering command and the beam shaping offset.

26. The method according to claim 25 wherein the plurality of phased array elements are arranged in a predetermined pattern about a phase center;

and wherein the at least one position related value is based upon physical positioning relative to the phase center.

27. The method according to claim 25 further comprising using the central controller to provide common beam shaping commands to all of the element controllers.

28. The method according to claim 27 wherein each common beam shaping command comprises a plurality of common beam shaping coefficients;

wherein the at least one position related value comprises a plurality of position related coefficients; and

wherein determining, at each element controller, the beam offset comprises determining the beam shaping offset based upon multiplications between the position related coefficients and the common beam shaping coefficients.

29. The method according to claim 28 wherein determining, at each element controller, the beam shaping offset further comprises determining the beam shaping offset based upon at least one accumulation.

30. The method according to claim 25 wherein storing, at each element controller, the at least one position related value comprises storing a plurality of beam shaping offsets for respective different beam shapes;

and wherein determining, at each element controller, the beam shaping offset comprises determining the beam shaping offset based upon receiving a corresponding beam shaping command therefor.

31. The method according to claim 25 wherein the central controller provides the at least one position related value for storing in each element controller.

32. The method according to claim 25 wherein the central controller determines the at least one position related value for storing in each element controller.

33. The method according to claim 25 wherein each element controller comprises at least one register for storing the at least one position related value.

34. The method according to claim 25 wherein the at least one phased array antenna element control value comprises at least one of a phase and attenuation value.