MIMO antenna configuration

• US 20070176829A1
• Filed: 01/31/2006
• Published: 08/02/2007
• Est. Priority Date: 01/31/2006
• Status: Active Grant

• Current Assignee: Accton Technology Corporation
• Original Assignee: Accton Technology Corporation
• Inventors: Liu, I-Ru
• Granted Patent: US 7,408,511 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

The present invention provides a MIMO antenna structure and design. A single dipole antenna stands at the center of a triangle which is formed by three PIFAs antennas, and the three PIFA antennas has equal squint angle relative to the neighbors, that is there is 120° sector angle between any two PIFA axes of three such that the dipole and the other PIFAs forms a tetrahedron. The MIMO antenna structure of the present invention is simpler in mechanics but high efficiency in performance.

Claims

1. A structure for MIMO multiple antennas system, comprises:

a housing for containing electronics communication modules;

a dipole antenna connected to said housing and stands vertically; and

three PIFAs connected to a PCB of said electronics communication modules within said housing, wherein the distances between said dipole antenna and each one of said three PIFAs are equal.

2. The structure in claim 1, wherein said housing is a box shaped with a rectangular cross section.

3. The structure in claim 2, wherein said dipole antenna stands outside of said housing.

4. The structure in claim 1, wherein the shape of said housing including a tetrahedron, a dome, a pyramid or a cube.

5. The structure in claim 4, wherein said dipole antenna stands inside of said housing.

6. The structure in claim 1, wherein said three PIFAs are located on a loop that approximately forms a triangle.

7. The structure in claim 6, wherein said triangle is regular triangle.

8. The structure in claim 1, wherein said distances between said dipole antenna and each one of said PIFAs are greater than 1 λ

and less than 10 λ

in typical indoor MIMO area for AP.

9. The structure in claim 1, wherein said distances between said dipole antenna and each one of said PIFAs are greater than 100 λ

in typical outdoor MIMO area for AP.

10. The structure in claim 1, wherein said three PIFAs are attached on a co-planar surface within said housing.

18. The structure in claim 9, wherein said three PIFAs are located on a loop that approximately forms a triangle and mounted on the corners of said housing.

20. The structure in claim 8, wherein said distances between said standalone antenna module and each one of said three PIFAs are greater than 1 λ

and less than 10 λ

in typical indoor MIMO area for AP.

21. The structure in claim 8, wherein said distances between said standalone antenna module and each one of said three PIFAs are greater than 100 λ

in typical outdoor MIMO area for AP.

22. The structure in claim 8, wherein said three PIFAs are attached on a co-planar surface within said housing.

11. A structure for MIMO multiple antennas system, comprises:

a housing for containing electronics communication modules;

a standalone antenna module connected to said electronics communication modules and stands vertically on said housing; and

three PIFAs connected to a PCB of said electronics communication modules within said housing, wherein the distances between said standalone antenna module and each one of said three PIFAs are equal.

12. The structure in claim 11, wherein said standalone antenna module including a standalone PIFA module.

13. The structure in claim 11, wherein said standalone antenna module including a standalone vertical-polarization module.

14. The structure in claim 11, wherein said hosing is a box shaped with a rectangular cross section.

15. The structure in claim 12, wherein said standalone antenna module stands outside of said housing.

16. The structure in claim 11, wherein the shape of said housing including a tetrahedron, a dome, a pyramid or a cube.

17. The structure in claim 14, wherein said standalone antenna module stands inside of said housing.

19. The structure in claim 16, wherein said triangle is regular triangle.