Cylindrical polarimetric phased array radar

• US 9,778,357 B2
• Filed: 03/23/2015
• Issued: 10/03/2017
• Est. Priority Date: 11/16/2009
• Status: Active Grant

• Current Assignee: The Board of Regents of the University of Colorado (University of Colorado System)
• Original Assignee: The Board of Regents of the University of Colorado (University of Colorado System)
• Inventors: Zhang, Guifu, Palmer, Robert D., Zrnic, Dusan S., Doviak, Richard J.
• Primary Examiner(s): Windrich, Marcus
• Application Number:
  US14/665,813
• Publication Number:
  US 20150192671A1
• Time in Patent Office: 925 Days
• Field of Search: 342 26 R- 26 D
• CPC Class Codes: G01S 13/95 for meteorological use
• CPC Class Codes: G01S 2013/0245 Radar with phased array antenna
• CPC Class Codes: G01S 2013/0272 Multifunction radar
• CPC Class Codes: G01S 7/024 using polarisation effects in waveguides H01P1/165; for aerials H01Q, e.g. H01Q15/22, H01Q15/24, H01Q19/195
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• 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: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

A method of collecting data using a polarimetric phased array antenna is described. The method includes directing electromagnetic signals to selected panels of an array of panels so as to transmit a dual H and V polarized electromagnetic beam (1) having the same beam width in all azimuth directions and (2) maintaining cross-polarization isolation via orthogonal dual-polarizations in all beam pointing directions. The panels include antennas having a horizontally (H) polarized array element and a vertically (V) polarized array element arranged to form two orthogonally polarized horizontal and vertical radiating fields which together form the dual H and V polarized electromagnetic beam. The array of panels is arranged so as to form a substantially cylindrical configuration on a support system. Reflection signals sensed by the selected panels formed by scattering of said dual H and V polarized electromagnetic beam are received and have a reflection frequency spectrum.

Claims

1. A method of collecting data using a polarimetric phased array antenna, the method comprising:

directing electromagnetic signals to one or more selected panels of an array of panels so as to transmit and commutating scan a dual H and V polarized electromagnetic beam, wherein said dual H and V polarized electromagnetic beam (1) has the same beam width in all azimuth directions and (2) maintains cross-polarization isolation via orthogonal dual-polarizations in all beam pointing directions, the array of panels comprising a plurality of antennas, wherein each antenna comprises a horizontally (H) polarized array element and a vertically (V) polarized array element arranged to form two orthogonally polarized horizontal and vertical radiating fields which together form the dual H and V polarized electromagnetic beam, wherein the array of panels is arranged so as to form a substantially cylindrical configuration on a support system; and

receiving reflection signals sensed by the one or more selected panels formed by scattering of said dual H and V polarized electromagnetic beam, wherein said reflection signals have a reflection frequency spectrum configured to be processed into an electronic radar output.

2. The method of claim 1, wherein directing the electromagnetic signals and receiving reflection signals is performed by a radar control and processing system configured to form the electromagnetic signals and read and process the reflection signals into the electronic radar output.

3. The method of claim 1, wherein the electronic radar output is indicative of weather information.

4. The method of claim 3, wherein the weather information includes precipitation information.

5. The method of claim 1, wherein the array of panels is arranged in multiple columns and rows.

6. The method of claim 1, wherein directing the electromagnetic signals to the one or more selected panels of the array of panels is defined further as directing the electromagnetic signals to a switching network which communicates with the one or more selected panels.

7. The method of claim 6, wherein directing the electromagnetic signals to the one or more selected panels of the array of panels is defined further as directing a first subset of the electromagnetic signals to the switching network so as to transmit a first one of the dual H and V polarized electromagnetic beam for a first task, and directing a second subset of the electromagnetic signals to the switching network so as to transmit a second one of the dual H and V polarized electromagnetic beam for a second task, wherein the first task is different from the second task.

8. A method of collecting data using a polarimetric phased array antenna, the method comprising:

forming electromagnetic signals based on a phase shift term and a weighting matrix;

directing the electromagnetic signals to one or more selected panels of an array of panels so as to transmit and commutating scan a dual H and V polarized electromagnetic beam, wherein said dual H and V electromagnetic beam (1) has the same beam width in all azimuth directions and (2) maintains cross-polarization isolation via orthogonal dual-polarizations in all beam pointing directions, the array of panels comprising a plurality of antennas, wherein each antenna comprises a horizontally (H) polarized array element and a vertically (V) polarized array element arranged to form two orthogonally polarized horizontal and vertical radiating fields which together form the dual H and V polarized electromagnetic beam, wherein the array of panels is arranged so as to form a substantially cylindrical configuration on a support system; and

receiving reflection signals sensed by the one or more selected panels formed by scattering of said dual H and V polarized electromagnetic beam, wherein said reflection signals have a reflection frequency spectrum configured to be processed into an electrical radar output.

9. The method of claim 8, wherein directing the electromagnetic signals and receiving the reflection is performed by a radar control and processing system configured to form the electromagnetic signals and read and process the reflection signals into the electronic radar output.

10. The method of claim 8, wherein the electronic radar output is indicative of weather information.

11. The method of claim 10, wherein the weather information includes precipitation information.

12. The method of claim 8, wherein the array of panels is arranged in multiple columns and rows.

13. The method of claim 8, wherein directing the electromagnetic signals to the one or more selected panels of the array of panels is defined further as directing the electromagnetic signals to a switching network which communicates with the one or more selected panels.

14. The method of claim 13, wherein directing the electromagnetic signals to the one or more selected panels is defined further as directing a first subset of the electromagnetic signals to the switching network so as to transmit a first one of the dual H and V polarized electromagnetic beam for a first task, and directing a second subset of the electromagnetic signals to the switching network so as to transmit a second one of the dual H and V polarized electromagnetic beam for a second task in which the first task is different from the second task, wherein the first task is different from the second task.

15. A method of collecting data using a polarimetric phased array antenna, the method comprising:

forming at least one first electromagnetic signal based on a first phase shift term and a first weighting matrix;

forming at least one second electromagnetic signal based on a second phase shift term and a second weighting matrix;

directing the at least one first electromagnetic signal to one or more selected first panels of an array of panels so as to transmit and commutating scan at least one first dual H and V polarized electromagnetic beam, wherein said at least one first dual H and V polarized electromagnetic beam (1) has the same beam width in all azimuth directions and (2) maintains cross-polarization isolation via orthogonal dual-polarizations in all beam pointing directions, the array of panels comprising a plurality of antennas, wherein each antenna comprises a horizontally (H) polarized array element and a vertically (V) polarized array element arranged to form two orthogonally polarized horizontal and vertical radiating fields which together form the dual H and V polarized electromagnetic beam, wherein the array of panels is arranged so as to form a substantially cylindrical configuration on a support system;

directing the at least one second electromagnetic signal to one or more selected second panels of the array of panels so as to transmit and commutating scan at least one second dual H and V polarized electromagnetic beam, wherein said at least one second dual H and V polarized electromagnetic beam (1) has the same beam width in all azimuth directions and (2) maintains cross-polarization isolation via orthogonal dual-polarizations in all beam pointing directions; and

receiving reflection signals sensed by the one or more first or second selected panels formed by scattering of said at least one first and second dual H and V polarized electromagnetic beams, wherein said reflection signals have a reflection frequency spectrum configured to be processed into an electronic radar output.

16. The method of claim 15, wherein the at least one first and second dual H and V polarized magnetic beams may be transmitted simultaneously.

17. The method of claim 15, wherein directing the at least one first and second electromagnetic signals and receiving reflection signals is performed by a radar control and processing system configured to form the at least one first and second electromagnetic signals and read and process the reflection signals into the electronic radar output.

18. The method of claim 15, wherein the electronic radar output is indicative of weather information.

19. The method of claim 18, wherein the weather information includes precipitation information.

20. The method of claim 15, wherein the array of panels is arranged in multiple columns and rows.

21. The method of claim 15, wherein directing the at least one first and second electromagnetic signals to the one or more selected first and second panels of the array of panels is defined further as directing the at least one first and second electromagnetic signals to a switching network which communicates with the one or more selected first and second panels.

22. The method of claim 21, wherein directing the at least one first and second electromagnetic signals to the one or more selected first and second panels of the array of panels is defined further as directing the at least one first electromagnetic signal to the switching network so as to transmit at least one first dual H and V polarized electromagnetic beams for a first task, and directing the at least one second electromagnetic signal to the switching network so as to transmit at least one second dual H and V polarized electromagnetic beam for a second task, wherein the first task is different from the second task.