IP Library › Granted Patent US 12,261,365
Granted Patent B2
US 12,261,365 · App. 18/245,484 · Granted Mar 25, 2025

X-band dual-polarized slotted waveguide antenna (SWGA) array unit cell for large e-scanning radar systems

Inventors: Nafati Aboserwal (Norman, OK); Jorge L Salazar-Cerreno (Norman, OK); Zeeshan Qamar (Norman, OK)
Assignee: The Board of Regents of the University of Oklahoma
H01Q21/005H01Q3/36H01Q21/24
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Quick Facts
Patent No.
US 12,261,365
App. No.
18/245,484
Granted
Mar 25, 2025
Kind
B2
Abstract

An X-band dual-polarized slotted waveguide antenna (SWGA) array unit cell comprises a partial H-plane waveguide with a metal vane; and a conventional waveguide in a side-by-side arrangement with the partial H-plane waveguide. A spacing between elements of the X-band dual-polarized SWGA array unit cell in an azimuth plane is in a range of about 0.6λo to about 0.5λo. The X-band dual-polarized SWGA array unit cell has a one-dimensional (1D) electronic-scanning range of at least 84° (±42°) in the azimuth plane perpendicular to a waveguide axis. The X-band dual-polarized SWGA array unit cell has a cross-polarization isolation of about −60 decibels (dB) or less.

Claims (37)

1. An X-band dual-polarized slotted waveguide antenna (SWGA) array unit cell comprising:

a partial H-plane waveguide with a metal vane; and

a conventional waveguide in a side-by-side arrangement with the partial H-plane waveguide,

wherein a spacing between elements of the X-band dual-polarized SWGA array unit cell in an azimuth plane is in a range of about 0.6λ o to about 0.5λ o ,

wherein the X-band dual-polarized SWGA array unit cell has a one-dimensional (1D) electronic-scanning range of at least 84° (±42°) in the azimuth plane perpendicular to a waveguide axis, and

wherein the X-band dual-polarized SWGA array unit cell has a cross-polarization isolation of about −60 decibels (dB) or less.

2. The X-band dual-polarized SWGA array unit cell of claim 1 , wherein the 1D electronic-scanning range is within a range of 84° (±42°)to 180° (±90°).

3. The X-band dual-polarized SWGA array unit cell of claim 1 , wherein the cross-polarization isolation is in a range of about −60 dB to about −70 dB.

4. The X-band dual-polarized SWGA array unit cell of claim 1 , wherein the conventional waveguide comprises standardized dimensions.

5. The X-band dual-polarized SWGA array unit cell of claim 1 , wherein λ o is a free-space wavelength.

6. A sub-array panel comprising:

a plurality of the X-band dual-polarized slotted waveguide antenna (SWGA) array unit cells, wherein each of the X-band dual-polarized SWGA array unit cells comprises:

a partial H-plane wayeguide with a metal vane; and

a conventional wayeguide in a side-by-side arrangement with the partial H-plane waveguide,

wherein a spacing between elements of the X-band dual-polarized SWGA array unit cells in an azimuth plane is in a range of about 0.6λ o to about 0.5λ o ,

wherein the X-band dual-polarized SWGA array unit cells have a one-dimensional (1D) electronic-scanning range of at least 84° (±42°) in the azimuth plane perpendicular to a waveguide axis, and

wherein the X-band dual-polarized SWGA array unit cells have a cross-polarization isolation of about −60 decibels (dB) or less.

7. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 4 to 676 of the X-band dual-polarized SWGA array unit cells.

8. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 4 to 400 of the X-band dual-polarized SWGA array unit cells.

9. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 4 to 256 of the X-band dual-polarized SWGA array unit cells.

10. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 64 to 144 of the X-band dual-polarized SWGA array unit cells.

11. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises n 2 of the X-band dual-polarized SWGA array unit cells arranged in an nxn configuration, and wherein n is in a range of from 2 to 26.

12. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises n 2 of the X-band dual-polarized SWGA array unit cells arranged in an n×n configuration, and wherein n is in a range of from 4 to 16.

13. The sub-array panel of claim 6 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises n 2 of the X-band dual-polarized SWGA array unit cells arranged in an n×n configuration, and wherein n is in a range of from 8 to 12.

14. The sub-array panel of claim 6 , wherein the 1D electronic-scanning range is within a range of 84° (±42°) to 180° (±90°).

15. The sub-array panel of claim 6 , wherein the cross-polarization isolation is in a range of about −60 dB to about −70 dB.

16. The sub-array panel of claim 6 , wherein the conventional waveguide comprises standardized dimensions.

17. The sub-array panel of claim 6 , wherein λ o is a free-space wavelength.

18. A radar array comprising:

a plurality of sub-array panels, wherein each of the sub-array panels comprises a plurality of X-band dual-polarized slotted waveguide antenna (SWGA) array unit cells, wherein each of the X-band dual-polarized SWGA array unit cells comprises:

a partial H-plane waveguide with a metal vane; and

a conventional waveguide in a side-by-side arrangement with the partial H-plane waveguide,

wherein a spacing etween elements of the X-band dual-polarized SWGA array unit cells in an azimuth plane is in a range of about 0.6λ o to about 0. 5λ o ,

wherein the X-band dual-polarized SWGA array unit cells have a one-dimensional (1D) electronic-scanning range of at least 84° (±42°) in the azimuth plane perpendicular to a waveguide axis, and

wherein the X-band dual-polarized SWGA array unit cells have a cross-polarization isolation of about −60 decibels (dB) or less.

19. The radar array of claim 18 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 4 to 676 of the X-band dual-polarized SWGA array unit cells.

20. The radar array of claim 18 , wherein the plurality of the X-band dual-polarized SWGA array unit cells comprises 4 to 400 of the X-band dual-polarized SWGA array unit cells.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 15, 2023
From: SALAZAR-CERRENO, JORGE L.; ABOSERWAL, NAFATI; QAMAR, ZEESHAN
To: THE BOARD OF REGENTS OF THE UNIVERSITY OF OKLAHOMA
Reel/Frame 063966/0366 →
Continuity (2)
Provisional Application 63091050 · Oct 13, 2020
Related Publication 20230361481A1 · Nov 9, 2023
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