Multichannel access point with collocated isolated antennas

• US 20040183726A1
• Filed: 03/18/2003
• Published: 09/23/2004
• Est. Priority Date: 03/18/2003
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Theobold, David M.
• Granted Patent: US 6,933,909 B2
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/007 specially adapted for indoor communication
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• 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 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00

Abstract

A wireless telecommunications device is disclosed including a plurality of wireless antennas, each respectively for transmitting and/or receiving wireless signals into a predetermined sector of an omnidirectional space. A mounting structure is included for retaining the respective plurality of wireless antennas, wherein the mounting structure is configured so as to isolate the respective wireless signals.

Claims

1. A wireless telecommunications device comprising:

a plurality of wireless antennas, each respectively for at least one of transmitting and receiving wireless signals into a predetermined sector of an omnidirectional space;

a mounting structure for retaining the respective plurality of wireless antennas, wherein the mounting structure is configured so as to isolate the respective wireless signals.

2. The wireless telecommunications device of claim 1 wherein at least one of the wireless antennas comprises a patch antenna having a predetermined front-to-back ratio and depolarization.

3. The wireless telecommunications device of claim 2 wherein the patch antenna comprises an active antenna element and a passive antenna element substantially spaced apart from each other.

4. The wireless telecommunications device of claim 1 wherein the mounting structure is configured to retain the respective wireless antennas at a predetermined separation from each other.

5. The wireless telecommunications device of claim 4 wherein the predetermined separation between the respective antennas is at least two wavelengths of the wireless signals.

6. The wireless telecommunications device of claim 1 wherein the mounting structure is configured to retain the respective wireless antennas at a predetermined angle of inclination from each other.

7. The wireless telecommunications device of claim 6 wherein the mounting structure retains the respective wireless antennas on surfaces configured at a predetermined inclination of 90 degrees to each other.

8. The wireless telecommunications device of claim 1 wherein each of the plurality of wireless antennas transmits and receives signals over the same wireless signal bandwidth.

9. The wireless telecommunications device of claim 1 wherein each antenna covers a different predetermined sector of the omnidirectional space.

10. The wireless telecommunications device of claim 1 wherein the plurality of antennas comprise at least one diversity antenna pair.

12. The wireless telecommunications device of claim 1 wherein each patch antenna comprises an active antenna element and a passive antenna element substantially spaced apart from each other.

17. The wireless telecommunications device of claim 10 wherein the plurality of antennas comprise at least one diversity antenna pair.

11. A wireless telecommunications device comprising:

a plurality of patch antennas, each having a predetermined front-to-back ratio and depolarization, for at least one of transmitting and receiving wireless signals into a predetermined sector of an omnidirectional space;

a mounting structure for retaining the respective plurality of patch antennas, and configured to retain the respective wireless antennas at one of a predetermined separation and a predetermined angle of inclination from each respective other, so as to isolate the respective wireless signals.

13. The wireless telecommunications device of claim 11 wherein the predetermined separation between the respective antennas is at least two wavelengths of the wireless signals.

14. The wireless telecommunications device of claim 11 wherein the mounting structure retains the respective wireless antennas on surfaces configured at a predetermined inclination of 90 degrees to each other.

15. The wireless telecommunications device of claim 11 wherein each of the plurality of patch antennas transmits and receive signals over the same wireless signal bandwidth.

16. The wireless telecommunications device of claim 11 wherein each antenna covers a different predetermined sector of the omnidirectional space.