Array structure for the application to wireless switch of WLAN and WMAN

• US 7,567,213 B2
• Filed: 05/02/2006
• Issued: 07/28/2009
• Est. Priority Date: 05/02/2006
• Status: Active Grant

• Current Assignee: Accton Technology Corporation
• Original Assignee: Accton Technology Corporation
• Inventors: Liu, I-Ru
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US11/381,179
• Publication Number:
  US 20070257858A1
• Time in Patent Office: 1,183 Days
• Field of Search: 343/853, 343/893, 342/373
• US Class Current: 343/853
• CPC Class Codes: H01Q 1/007 specially adapted for indoor communication
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/20 the units being spaced along or adjacent to a curvilinear path slotted waveguide arrays H01Q21/005; circularly or helically slotted waveguides H01Q21/0062
• 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

Abstract

The present invention provides an antenna array structure which includes multiple array elements, and the antenna array structure is using for the application of the WLAN (wireless local area network) or WMAN (wireless metro area network.) Furthermore, the array elements of the present invention are phased arrays or attenuated arrays, and when configuration with different type of the array element is used, the corresponding BFN (beam forming network) can also be implemented in various possibilities. With all the configuration of the present invention, the manufacturers can have a stable array structure for their applications.

Claims

1. An array structure, comprising:

a plurality of array elements configured in a circular or cylindrical configuration, wherein the adjacent space between said plurality of array elements is substantially half of the radio wavelength of said plurality of array elements, and the diameter of said circular or cylindrical configuration is greater than the radio wavelength of said plurality of array elements; and

a plurality of beam forming networks, coupled to antenna ports of said array elements to deliver the formed beams to wireless local area network or wireless metro area network applications through beam ports thereof, for simultaneously forming multiple beams to cover omni-direction azimuths and all azimuths in board or narrow elevations.

2. The array structure of claim 1, wherein said array elements comprise phased arrays.

3. The array structure of claim 2, wherein said beam forming networks comprise butler matrices and 90°

hybrid couplers.

4. The array structure of claim 2, wherein said beam forming network includes a contiguous 4-ports butler matrices.

5. The array structure of claim 2, wherein said beam forming network includes a contiguous 2-ports 90°

hybrid couplers.

6. An array structure, comprising:

a plurality of array elements configured in a circular or cylindrical configuration, wherein the adjacent space between said plurality of array elements is substantially half of the radio wavelength of said plurality of array elements, and the diameter of said circular or cylindrical configuration is greater than the radio wavelength of said plurality of array elements;

a plurality of input power dividers coupled to antenna ports of said array elements; and

a plurality of beam forming networks, coupled to output ports of said input power dividers to deliver the formed beams to wireless local area network or wireless metro area network applications though beam ports thereof, for simultaneously forming multiple beams to cover omni-direction azimuths and all azimuths in board or narrow elevations.

7. The array structure of claim 6, wherein said beam forming network includes a staggered 4-ports butler matrices.

8. The array structure of claim 6, wherein said beam forming network includes a staggered 2-ports 90°

hybrid couplers.

9. The array structure of claim 6, further comprising:

plurality of switches coupled to said output ports of said input power divider and antenna ports of said beam forming network.

10. The array structure of claim 9, wherein said beam forming network includes a staggered 4-ports butler matrices.

11. The array structure of claim 9, wherein said beam forming network includes a staggered 2-ports 90°

hybrid couplers.

12. An array structure, comprising:

a plurality of array elements configured in a circular or cylindrical configuration, wherein the adjacent space between said plurality of array elements is smaller than a half of the radio wavelength and said array elements comprise attenuated arrays;

a plurality of input power dividers coupled to antenna ports of said array elements; and

a plurality of beam forming networks, coupled to output ports of said input power divider to deliver the formed beams to wireless local area network or wireless metro area network applications through beam ports thereof, for simultaneously forming multiple beams to cover omni-direction azimuths and all azimuths in board or narrow elevations.

13. The array structure of claim 12, wherein said beam forming network includes a staggered microwave comparators.

14. The array structure of claim 12, wherein said beam forming network includes a staggered Magic-T couplers.