MULTIPLE ANTENNA HIGH ISOLATION APPARATUS AND APPLICATION THEREOF

• US 20100220022A1
• Filed: 04/30/2010
• Published: 09/02/2010
• Est. Priority Date: 01/15/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Yoon, Seunghwan, Alexopoulos, Nicolaos G.
• Granted Patent: US 8,570,229 B2
• Time in Patent Office: Days
• US Class Current: 343/727
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/525 between emitting and receiving antennas
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

A multiple antenna apparatus includes a substrate, a first antenna structure, and a second antenna structure. The first antenna structure includes a first metal trace that has a first pattern confined in a first geometric shape and has a near-zero electric field plane. The second antenna structure includes a second metal trace that has a first pattern confined to a second geometric shape. The second antenna structure is positioned on the substrate in substantial alignment with the near-zero electric field plane of the first antenna structure.

Claims

1. A multiple antenna apparatus comprises:

a substrate;

a first antenna structure including a first metal trace that has a first pattern confined in a first geometric shape, where the first antenna structure has a near-zero electric field plane, and wherein the substrate supports the first antenna structure; and

a second antenna structure including a second metal trace that has a first pattern confined to a second geometric shape, wherein the second antenna structure is positioned on the substrate in substantial alignment with the near-zero electric field plane of the first antenna structure.

2. The multiple antenna apparatus of claim 1, wherein each of the first and second patterns of the first and metal traces comprises a geometric shape of a recursive fractal curve pattern, wherein the recursive fractal curve pattern includes at least one of:

an n^th order, where n is equal to or greater than 1;

a y^th order, where y is equal to or greater than 1;

a first line width;

a second line width;

a first shaping factor; and

a second shaping factor.

3. The multiple antenna apparatus of claim 1 further comprises the first geometric shape substantially equals the second geometric shape, wherein the first geometric shape is of a first size and the second geometric shape is of a second size.

4. The multiple antenna apparatus of claim 1 further comprises:

the first metal trace including;

a first segment on a first layer of the substrate, wherein the first segment has a first segment geometric shape; and

a second segment on a second layer of the substrate, wherein the second segment is coupled to the first segment, wherein the second segment has a second segment geometric shape, and wherein the first geometric shape includes the first and second segment geometric shapes; and

the second metal trace including;

a third segment on the first layer of the substrate, wherein the third segment has a third segment geometric shape; and

a fourth segment on the second layer of the substrate, wherein the fourth segment is coupled to the third segment, wherein the fourth segment has a fourth segment geometric shape, and wherein the second geometric shape includes the third and fourth segment geometric shapes.

5. The multiple antenna apparatus of claim 1 further comprises at least one of:

the first antenna structure including a dipole antenna and the second antenna structure including a monopole antenna; and

the first antenna structuring including multiple antennas and the second antenna structure including at least one antenna.

6. The multiple antenna apparatus of claim 5, wherein the dipole antenna further comprises a bow tie shape.

7. The multiple antenna apparatus of claim 5 further comprises:

the dipole antenna on a first layer of the substrate; and

the monopole antenna on a second layer of the substrate.

8. The multiple antenna apparatus of claim 1 further comprises:

a ground plane electromagnetically coupled to at least one of the first and second antenna structures.

9. The multiple antenna apparatus of claim 1 further comprises each of the first and second antenna structures having a length tuned to at least one of a first frequency band and a second frequency band.

10. A multiple antenna apparatus comprises:

a substrate;

a dipole antenna that has a near-zero electric field plane, wherein the substrate supports the dipole antenna; and

a monopole antenna positioned on the substrate in substantial alignment with the near-zero electric field plane of the dipole antenna.

11. The multiple antenna apparatus of claim 10 further comprises:

a first trace of the dipole antenna having a first geometric shape;

a second trace of the dipole antenna having the first geometric shape;

a trace of the monopole antenna having a second geometric shape, wherein each of the first and second geometric shapes includes a recursive fractal curve pattern, wherein the recursive fractal curve pattern includes at least one of;

an n^th order, where n is equal to or greater than 1;

a y^th order, where y is equal to or greater than 1;

a first line width;

a second line width;

a first shaping factor; and

a second shaping factor.

12. The multiple antenna apparatus of claim 11 further comprises:

each of the first and second traces including;

a first segment on a first layer of the substrate, wherein the first segment has a first segment geometric shape; and

a second segment on a second layer of the substrate, wherein the second segment is coupled to the first segment, wherein the second segment has a second segment geometric shape, and wherein the first geometric shape includes the first and second segment geometric shapes; and

the trace of the monopole antenna including;

a third segment on the first layer of the substrate, wherein the third segment has a third segment geometric shape;

an

a fourth segment on the second layer of the substrate, wherein the fourth segment is coupled to the third segment, wherein the fourth segment has a fourth segment geometric shape, and wherein the second geometric shape includes the third and fourth segment geometric shapes.

13. The multiple antenna apparatus of claim 10, wherein the dipole antenna further comprises a bow tie shape.

14. The multiple antenna apparatus of claim 10 further comprises:

the dipole antenna on a first layer of the substrate; and

the monopole antenna on a second layer of the substrate.

15. The multiple antenna apparatus of claim 10 further comprises:

a ground plane electromagnetically coupled to at least one of the dipole antenna and the monopole antenna.

16. A wireless front-end comprises:

a first amplifier;

a second amplifier;

a transformer balun operably coupled to the first amplifier; and

a multiple antenna apparatus that includes;

a substrate;

a dipole antenna operably coupled to the transformer balun, wherein the dipole antenna has a near-zero electric field plane, and wherein the substrate supports the dipole antenna; and

a monopole antenna operably coupled to the second amplifier, wherein the monopole antenna is positioned on the substrate in substantial alignment with the near-zero electric field plane of the dipole antenna.

17. The wireless front-end of claim 16, wherein the multiple antenna apparatus further comprises:

a first trace of the dipole antenna having a first geometric shape;

a second trace of the dipole antenna having the first geometric shape;

a trace of the monopole antenna having a second geometric shape, wherein each of the first and second geometric shapes includes a recursive fractal curve pattern, wherein the recursive fractal curve pattern includes at least one of;

an n^th order, where n is equal to or greater than 1;

a y^th order, where y is equal to or greater than 1;

a first line width;

a second line width;

a first shaping factor; and

a second shaping factor.

18. The wireless front-end of claim 17, wherein the multiple antenna apparatus further comprises:

each of the first and second traces including;

a first segment on a first layer of the substrate, wherein the first segment has a first segment geometric shape; and

a second segment on a second layer of the substrate, wherein the second segment is coupled to the first segment, wherein the second segment has a second segment geometric shape, and wherein the first geometric shape includes the first and second segment geometric shapes; and

the trace of the monopole antenna including;

a third segment on the first layer of the substrate, wherein the third segment has a third segment geometric shape;

an

a fourth segment on the second layer of the substrate, wherein the fourth segment is coupled to the third segment, wherein the fourth segment has a fourth segment geometric shape, and wherein the second geometric shape includes the third and fourth segment geometric shapes.

19. The wireless front-end of claim 16, wherein the dipole antenna further comprises a bow tie shape.

20. The wireless front-end of claim 16 further comprises:

the dipole antenna on a first layer of the substrate; and

the monopole antenna on a second layer of the substrate.

21. The wireless front-end of claim 16, wherein the multiple antenna apparatus further comprises:

a ground plane electromagnetically coupled to at least one of the dipole antenna and the monopole antenna.

22. The wireless front-end of claim 16 further comprises:

the first amplifier including a power amplifier of a transmitter; and

the second amplifying including a low noise amplifier of a receiver.

23. The wireless front-end of claim 16 further comprises:

the first amplifier amplifying a first transmission signal of a multiple input multiple output (MIMO) signal or a single input multiple output (SIMO) signal; and

the second amplifier amplifying a second transmission signal of the MIMO or SIMO signal.

24. The wireless front-end of claim 16 further comprises:

the first amplifier amplifying a first reception signal of a multiple input multiple output (MIMO) signal or multiple input single output (MISO) signal; and

the second amplifier amplifying a second reception signal of the MIMO of MISO signal.