Multi-antenna for a multi-input multi-output wireless communication system
View Patent ↗A multi-antenna for a multi-input multi-output wireless communication system includes a substrate, a first planar antenna formed on the substrate along a first direction, a second planar antenna formed on the substrate along a second direction, and a vertical antenna including a conductor formed on the substrate and between the first planar antenna and the second planar antenna, and a radiator perpendicular to the substrate and coupled to the conductor.
1. A multi-antenna for a multi-input multi-output wireless communication system comprising:
a substrate;
a first planar monopole antenna of a first current direction formed on a surface of the substrate along a first direction;
a second planar monopole antenna of a second current direction formed on the surface of the substrate along a second direction; and
a vertical dipole antenna of a third current direction, comprising:
a conductor formed on the surface of the substrate and between the first planar monopole antenna and the second planar monopole antenna; and
a radiator perpendicular to the substrate and coupled to the conductor;
wherein the first, second, and third current directions are orthogonal to each other.
2. The multi-antenna of claim 1 , wherein the first direction and the second direction are orthogonal.
3. The multi-antenna of claim 2 , wherein radiating fields generated respectively by the first planar monopole antenna and the second planar monopole antenna are in 90 degrees of polarization diversity.
4. The multi-antenna of claim 1 , wherein the first planar monopole antenna comprises:
a first conductor formed on the substrate along the first direction; and
a first radiator formed on the substrate and coupled to the first conductor.
5. The multi-antenna of claim 4 , wherein the first radiator comprises two branches, and the first planar monopole antenna is a dual-band antenna.
6. The multi-antenna of claim 4 , wherein the first planar monopole antenna further comprises a signal feeding terminal formed at an end of the first conductor uncoupled to the first radiator.
7. The multi-antenna of claim 1 , wherein the second monopole planar antenna comprises:
a second conductor formed on the substrate along the second direction; and
a second radiator formed on the substrate and coupled to the second conductor.
8. The multi-antenna of claim 7 , wherein the second radiator comprises two branches, and the second planar monopole antenna is a dual-band antenna.
9. The multi-antenna of claim 7 , wherein the second planar monopole antenna further comprises a signal feeding terminal formed at an end of the second conductor uncoupled to the second radiator.
10. The multi-antenna of claim 1 , wherein the radiator of the vertical dipole antenna comprises:
an upper radiator formed on the substrate and coupled to the conductor; and
a lower radiator formed under the substrate and coupled to the conductor.
11. The multi-antenna of claim 10 , wherein shapes of the upper radiator and the lower radiator are symmetric.
12. The multi-antenna of claim 11 , wherein both of the upper radiator and the lower radiator comprise two branches, and the vertical dipole antenna is a dual-band antenna.
13. The multi-antenna of claim 1 , wherein the vertical dipole antenna further comprises a vertical substrate for disposing the radiator.
14. The multi-antenna of claim 1 , wherein the vertical dipole antenna further comprises a signal feeding terminal formed at an end of the conductor uncoupled to the radiator.
15. A multi-antenna for a multi-input multi-output wireless communication system comprising:
a substrate;
a first planar monopole antenna of a first polarization direction formed on a surface of the substrate along a first direction;
a second planar monopole antenna of a second polarization direction formed on the surface of the substrate along a second direction; and
a vertical dipole antenna of a third polarization direction, comprising:
a conductor formed on the surface of the substrate and between the first planar monopole antenna and the second planar monopole antenna; and
a radiator perpendicular to the substrate and coupled to the conductor;
wherein the first polarization direction is orthogonal to the third polarization direction, and the second polarization direction is orthogonal to the third polarization direction.
16. The multi-antenna of claim 15 , wherein the first planar monopole antenna is orthogonal to the second planar monopole antenna.
17. The multi-antenna of claim 15 , wherein radiating fields generated respectively by the first planar monopole antenna and the second planar monopole antenna are in 90 degrees of polarization diversity.
18. The multi-antenna of claim 15 , wherein the first planar monopole antenna comprises:
a first conductor formed on the substrate along the first direction; and
a first radiator formed on the substrate and coupled to the first conductor.
19. The multi-antenna of claim 15 , wherein the radiator of the vertical dipole antenna comprises:
an upper radiator formed on the substrate and coupled to the conductor; and
a lower radiator formed under the substrate and coupled to the conductor.
20. The multi-antenna of claim 15 , wherein the vertical dipole antenna further comprises a signal feeding terminal formed at an end of the conductor uncoupled to the radiator.