HIGH ISOLATION MULTIBAND MIMO ANTENNA SYSTEM

• US 20120139793A1
• Filed: 12/01/2010
• Published: 06/07/2012
• Est. Priority Date: 12/01/2010
• Status: Active Grant

• Current Assignee: King Fahd University Of Petroleum And Minerals
• Original Assignee: King Fahd University Of Petroleum And Minerals
• Inventors: SHARAWI, MOHAMMAD S.
• Granted Patent: US 8,786,497 B2
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• 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 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 9/065 Microstrip dipole antennas patch antenna H01Q9/0407

Abstract

The high isolation multiband MIMO antenna system is a multi-band dual and quad antenna for multiple-input-multiple-output (MIMO) antenna systems. Element and ground plane geometries that can cover a wide range of frequency bands (780 MHz-5850 MHz) are based on the varying some simple geometrical lengths and widths of the elements and ground planes. The MIMO antenna systems can be used for next generation cellular and wireless MIMO communication systems. Several isolation enhancement schemes increase the isolation between adjacent antenna elements. Any combination of the isolation and MIMO antenna system geometries can be created to support different wireless system standards. The novel MIMO antenna systems are disposed within a dielectric substrate area of 50×100 mm².

Claims

1. A high isolation multiband MIMO antenna system, comprising:

a substantially rectangular planar dielectric substrate having a top face and a bottom face;

a plurality of electrically conductive microstrip antennas disposed on the substantially planar substrate;

at least one substantially rectangular ground plane having an elongate extension thereof, the at least one substantially rectangular ground plane and elongate extension being disposed on the substantially planar substrate;

feeding points, for feeding signals, the feeding points being electrically connected to the antennas.

2. The high isolation multiband MIMO antenna system according to claim 1, wherein a width-wise edge of said at least one substantially rectangular ground plane is flush with a length-wise edge of said substrate and a width-wise edge of said elongate extension is flush with a width-wise edge of said substrate.

3. The high isolation multiband MIMO antenna system according to claim 1, wherein a width-wise edge of said at least one substantially rectangular ground plane is parallel to and proximate to a length-wise edge of said substrate.

4. The high isolation multiband MIMO antenna system according to claim 1, wherein a width-wise edge of said elongate extension is parallel to and proximate to a width-wise edge of said substrate.

5. The high isolation multiband MIMO antenna system according to claim 1, wherein said substrate has four quadrants, said at least one ground plane comprising four ground planes, each of the quadrants having a corresponding one of the ground planes disposed thereon.

6. The high isolation multiband MIMO antenna system according to claim 1, wherein said at least one substantially rectangular ground plane is disposed on the bottom face of said substrate.

7. The high isolation multiband MIMO antenna system according to claim 1, wherein said at least one substantially rectangular ground plane is disposed on the top face of said substrate.

8. The high isolation multiband MIMO antenna system according to claim 1, wherein said ground plane extension has a gap splitting the extension into two portions.

9. The high isolation multiband MIMO antenna system according to claim 1, wherein said ground plane extension has a plurality of gaps splitting the extension into multiple portions.

10. The high isolation multiband MIMO antenna system according to claim 1, wherein said plurality of antennas comprises two F-shaped radiator elements disposed on the top face of said planar substrate in diagonally opposed quadrants.

11. The high isolation multiband MEMO antenna system according to claim 1, wherein said plurality of antennas comprises one F shaped radiator element disposed on the top face and one F shaped radiator element disposed on the bottom surface of said planar substrate.

12. The high isolation multiband MIMO antenna system according to claim 1, wherein said plurality of antennas comprises four F shaped elements disposed on the top surface of said planar substrate, one in each quadrant of said substrate.

13. The high isolation multiband MIMO antenna system according to claim 1, wherein said plurality of antennas comprises two serpentine-shaped elements disposed on the top face of said planar substrate in diagonally opposed quadrants.

14. The high isolation multiband MIMO antenna system according to claim 1, wherein said plurality of antennas comprises a first serpentine-shaped element disposed on the top face and a second serpentine-shaped element disposed on the bottom face of said planar substrate.

15. The high isolation multiband MIMO antenna system according to claim 1, wherein said plurality of antennas comprises four serpentine-shaped antennas disposed on the top surface of said planar substrate, one in each quadrant of said substrate.

16. The high isolation multiband MIMO antenna system according to claim 11, wherein said plurality of antennas comprises a first two-dimensional prong-shaped antenna disposed on the top face of said planar substrate;

a second two dimensional prong shaped antenna disposed on said top surface of said planar substrate;

a third two dimensional prong shaped antenna disposed on said top surface of said planar substrate;

a fourth two dimensional prong shaped antenna disposed on said top surface of said planar substrate, the first through fourth prong-shaped antennas being disposed in different quadrants of the substrate, each two dimensional prong shaped antenna having a conductive member electrically connecting the two-dimensional prongs and a shortened arm extending from the conductive connecting member.

17. The high isolation multiband MEMO antenna system according to claim 1, wherein said plurality of antennas comprises a first pair of antennas resonant in a first frequency band and a second pair of antennas resonant in a second frequency band, the first pair of antennas being disposed in diagonally opposed quadrants of said substrate and the second pair of antennas being disposed in a different pair of diagonally opposed quadrants of said substrate.