Cylindrical polarimetric phased array radar

• US 8,988,274 B2
• Filed: 11/16/2010
• Issued: 03/24/2015
• 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., Zmic, Dusan S., Doviak, Richard J.
• Primary Examiner(s): Sotomayor, John B
• Assistant Examiner(s): WINDRICH, MARCUS E
• Application Number:
  US12/947,523
• Publication Number:
  US 20110285582A1
• Time in Patent Office: 1,589 Days
• Field of Search: 342/26
• US Class Current: 342/26.R
• 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 radar data acquisition system including a polarimetric phased array antenna and a radar control and processing system. The polarimetric phased array antenna includes a support system, an array of panels and a switching network. One or more of the panels include a dual pole antenna for at least one of transmitting and receiving a dual polarization electromagnetic beam. The switching network communicates with the panels such that at least one of power, radar and control signals are sent to and received from one or more selected panels. The radar control and processing system communicates with the switching network for forming electromagnetic signals directed to one or more selected panels such that the selected panels form a dual polarization electromagnetic beam, and for reading signals sensed by one or more selected panels and for decoding the signals into an electronic radar output.

Claims

1. A polarimetric phased array antenna, comprising:

a support system; and

an array of panels supported by the support system, 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 a dual H and V polarized electromagnetic beam, wherein the array of panels is arranged in multiple rows so as to form a substantially cylindrical configuration on the support system.

2. The polarimetric phased array antenna of claim 1, wherein the panels of the array of panels are planar and the array includes horizontally adjacent panels and vertically adjacent panels, and also wherein the horizontally adjacent panels are positioned at a non-zero angle and the vertically adjacent panels are in a same plane to form the substantially cylindrical configuration.

14. The polarimetric phased array antenna of claim 1, further comprising a switching network which communicates with one or more selected panels of the array of panels such that the at least one of power, radar and control signals are sent to and received from the one or more selected panels, and wherein the polarimetric phased array antenna further comprises a radar control and processing system configured to communicate with the switching network for forming electromagnetic signals for a first task and a second task in which the first task is different from the second task, and decoding the signals into the electronic radar output indicative of the first task and the second task.

15. The polarimetric phased array antenna of claim 14, wherein the electronic radar output is indicative of weather information.

16. The polarimetric phased array antenna of claim 15, wherein the weather information includes precipitation information.

17. The polarimetric phased array antenna of claim 16, wherein the precipitation information includes information about one or more of:

rain, snow, and drizzle.

19. The polarimetric phased array antenna of claim 1, wherein the horizontally polarized array element and the vertically polarized array element comprise a pair of dipoles in a cross pattern.

20. The polarimetric phased array antenna of claim 1, wherein the horizontally polarized array element and the vertically polarized array element are arranged in an interlaced fashion.

3. A radar data acquisition system, comprising:

a polarimetric phased array antenna, comprising;

a support system;

an array of panels supported by the support system, 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 a dual H and V polarized electromagnetic beam, wherein the array of panels is arranged in multiple rows so as to form a substantially cylindrical configuration on the support system; and

a radar control and processing system configured to form and direct electromagnetic signals based on a phase shift term and a weighting matrix to one or more selected panels such that the one or more selected panels form the dual H and V polarized electromagnetic beam, and adapted to read and decode signals sensed by one or more selected panels into an electronic radar output and wherein the 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.

4. The radar data acquisition system of claim 3, wherein the electronic radar output is indicative of weather information.

5. The radar data acquisition system of claim 3, further comprising a switching network which communicates with the one or more selected panels such that at least one of power, radar and control signals are sent to and received from the one or more selected panels, and wherein the radar control and processing system is configured to communicate with the switching network for forming electromagnetic signals for a first task and a second task in which the first task is different from the second task, and decoding the signals into the electronic radar output indicative of the first task and the second task.

6. A polarimetric phased array antenna, comprising:

an array of panels, 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 a dual H and V polarized electromagnetic beam;

a support system for supporting the array of panels in multiple rows such that the panels form a substantially cylindrical configuration; and

a switching network for communicating with one or more of the panels such that at least one of power, radar and control signals are sent to and received from the one or more panels.

7. The polarimetric phased array antenna of claim 6, wherein the panels of the array of panels are planar and the array includes horizontally adjacent panels and vertically adjacent panels, and also where the horizontally adjacently disposed panels are positioned at a non-zero angle and the vertically adjacent panels are in a same plane to form the substantially cylindrical configuration.

8. A radar data acquisition system, comprising:

a polarimetric phased array antenna, comprising;

an array of panels, 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 a dual H and V polarized electromagnetic beam, wherein the array of panels is arranged in a substantially cylindrical configuration on the support system;

a support system supporting the array of panels in a substantially cylindrical configuration;

a switching network communicating with one or more selected panels of the array of panels such that at least one of power, radar and control signals are sent to and received from the one or more selected panels; and

a radar control and processing system configured to form and direct electromagnetic signals based on a phase shift term and a weighting matrix to a switching network for forming electromagnetic signals directed to the one or more selected panels such that the one or more selected panels form the 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, and configured to read and decode signals sensed by one or more selected panels into an electronic radar output.

9. The radar data acquisition system of claim 8, wherein the electronic radar output is indicative of weather information.

10. The radar data acquisition system of claim 8, wherein the switching network is defined further such that at least one of power, radar and control signals are sent to and received from the one or more selected panels, and wherein the radar control and processing system is configured to communicate with the switching network for forming electromagnetic signals for a first task and a second task in which the first task is different from the second task, and decoding the signals into the electronic radar output indicative of the first task and the second task.

11. The radar data acquisition system of claim 8, wherein the panels of the array of panels are planar and the array includes horizontally adjacent panels and vertically adjacent panels, and wherein the horizontally adjacently disposed panels are positioned at a non-zero angle and the vertically adjacent panels are in a same plane to form the substantially cylindrical configuration.

12. The radar data acquisition system of claim 9, wherein the weather information includes precipitation information.

13. The radar data acquisition system of claim 12, wherein the precipitation information includes information about one or more of:

rain, snow, and drizzle.

18. A polarimetric phased array antenna, comprising:

a support system; and

an array of panels supported by the support system, 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 a dual H and V polarized electromagnetic beam, wherein the array of panels is arranged in multiple rows so as to form a substantially cylindrical configuration on the support system, and wherein at least one panel of the array of panels is configured to receive electromagnetic signals based on a phase shift term and a weighting matrix to form the dual H and V polarized electromagnetic beam, such that when the dual H and V polarized electromagnetic beam is transmitted from the at least one panel, the dual polarization electromagnetic beam has the same beam width in an azimuth direction and maintains cross-polarization isolation via orthogonal dual-polarizations when being scanned.