Antenna for wireless systems

• US 20030003959A1
• Filed: 06/28/2001
• Published: 01/02/2003
• Est. Priority Date: 06/28/2001
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Tsui, Ernest T., Harp, Jeffrey C.
• Granted Patent: US 7,158,813 B2
• Time in Patent Office: Days
• US Class Current: 455/561
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H04W 16/00 Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
• CPC Class Codes: H04W 16/24 Cell structures

Abstract

A base station for a wireless communication system has an antenna system that provides a downstream transmit pattern partitioned into azimuthal sectors and an upstream receive pattern partitioned into azimuthal sectors and elevation sectors. The base station has a transmitter connected to the antenna system to transmit a signal to a subscriber using the downstream transmit pattern, and a receiver connected to the antenna system for receiving a signal from the subscriber using the upstream receive pattern.

Claims

1. A base station for a wireless communication system, the base station comprising:

an antenna system configured to provide a downstream transmit pattern partitioned into azimuthal sectors and an upstream receive pattern partitioned into azimuthal sectors and elevation sectors;

a transmitter connected to the antenna system to transmit a signal to a subscriber using the downstream transmit pattern; and

a receiver connected to the antenna system and configured to receive a signal from the subscriber using the upstream receive pattern.

2. The base station of claim 1 wherein the downstream transmit pattern further comprises a downstream transmit pattern partitioned into elevation sectors.

3. The base station of claim 2 wherein the downstream transmit pattern elevation sectors comprise three elevation sectors.

4. The base station of claim 1 wherein the downstream transmit pattern further comprises a frequency reuse factor of at least 4.

5. The base station of claim 1 wherein each downstream transmit pattern azimuthal sector comprises an approximately 15 degree sector.

6. The base station of claim 1 wherein the downstream transmit pattern further comprises a frequency reuse factor of at least 2.

7. The base station of claim 1 wherein the transmitter and antenna system are configured to generate a downstream EIRP in at least one sector of approximately 69 dBW/6 MHz.

8. The base station of claim 1 wherein the downstream transmit pattern further comprises an elevation beam width greater than 8 degrees.

9. The base station of claim 8 wherein the elevation beam width is between approximately 15 degrees and approximately 20 degrees.

10. The base station of claim 1 wherein the downstream transmit pattern azimuthal sector further comprises a sidelobe level of at least 33 dB.

11. The base station of claim 1 wherein the downstream transmit pattern azimuthal sector further comprises a sidelobe level of at least 27 dB.

12. The base station of claim 1 wherein each upstream receive pattern azimuthal sector comprises an approximately 15 degree sector.

13. The base station of claim 1 wherein the upstream receive pattern elevation sectors comprise three elevation sectors.

14. The base station of claim 1 wherein the upstream receive pattern further comprises a frequency reuse factor of at least 4.

15. The base station of claim 1 wherein the antenna system comprises one antenna configured to provide the downstream transmit pattern and the upstream receive pattern.

16. The base station of claim 1 wherein the antenna system comprises a first antenna configured to provide the downstream transmit pattern and a second antenna configured to provide the upstream receive pattern.

18. The base station of claim 17 wherein the downstream transmit pattern further comprises a downstream transmit pattern partitioned into elevation sectors.

19. The base station of claim 18 wherein the downstream transmit pattern elevation sectors comprise three elevation sectors.

20. The base station of claim 18 wherein the downstream transmit pattern further comprises a frequency reuse factor of at least 4.

21. The base station of claim 17 wherein each downstream transmit pattern azimuthal sector comprises an approximately 15 degree sector.

22. The base station of claim 17 wherein the downstream transmit pattern further comprises a frequency reuse factor of at least 2.

23. The base station of claim 17 wherein the transmitter and transmit antenna are configured to generate a downstream EIRP in at least one sector of approximately 69 dBW/6 MHz.

24. The base station of claim 17 wherein the downstream transmit pattern further comprises an elevation beam width greater than 8 degrees.

25. The base station of claim 24 wherein the elevation beam width is between approximately 15 degrees and approximately 20 degrees.

26. The base station of claim 17 wherein the downstream transmit pattern azimuthal sector further comprises a sidelobe level of at least 33 dB.

28. The base station of claim 27 wherein the downstream transmit pattern elevation sectors comprise three elevation sectors.

29. The base station of claim 27 wherein the downstream transmit pattern further comprises a frequency reuse factor of at least 4.

17. A base station for a wireless communication system, the base station comprising:

a transmit antenna configured to provide a downstream transmit pattern partitioned into azimuthal sectors; and

a transmitter connected to the transmit antenna to transmit a signal to a subscriber using the downstream transmit pattern.

27. A base station for a wireless communication system, the base station comprising:

a transmit antenna configured to provide a downstream transmit pattern partitioned into elevation sectors; and

a transmitter connected to the transmit antenna to transmit a signal to a subscriber using the downstream transmit pattern.

30. A base station for a wireless communication system, the base station comprising:

a receive antenna configured to provide an upstream receive pattern partitioned into azimuthal sectors and elevation sectors; and

a receiver connected to the receive antenna and configured to receive a signal from a subscriber using the upstream receive pattern.

31. The base station of claim 30 wherein each upstream receive pattern azimuthal sector comprises an approximately 15 degree sector.

32. The base station of claim 30 wherein the upstream receive pattern elevation sectors comprise three elevation sectors.

33. The base station of claim 30 wherein the upstream receive pattern further comprises a frequency reuse factor of at least 4.

35. The base station of claim 34 wherein the upstream receive pattern elevation sectors comprise three elevation sectors.

36. The base station of claim 34 wherein the upstream receive pattern further comprises a frequency reuse factor of at least 4.

38. The system of claim 37 further comprising a cell frequency reuse factor of at least 3.

39. The system of claim 38 further comprising a cell radius approximately equal to a design range of the cell divided by the square root of 3.

40. The system of claim 37 further comprising a cell radius approximately equal to a design range of the cell divided by 1.5.

41. The system of claim 37 further comprising a subscriber antenna configured to receive the signal from the base station.

42. The system of claim 41 wherein the subscriber antenna further comprises a directional receive antenna pattern.

43. The system of claim 42 wherein the directional receive antenna pattern is formed using adaptive beamforming.

34. A base station for a wireless communication system, the base station comprising:

a receive antenna configured to provide an upstream receive pattern partitioned into elevation sectors; and

a receiver connected to the receive antenna and configured to receive a signal from a subscriber using the upstream receive pattern.

37. A cellular communication system comprising cells, each of which includes a base station comprising:

an antenna system configured to provide a downstream transmit pattern partitioned into azimuthal sectors and an upstream receive pattern partitioned into azimuthal sectors and elevation sectors;

a transmitter connected to the antenna system to transmit a signal to a subscriber using the downstream transmit pattern; and

a receiver connected to the antenna system and configured to receive a signal from the subscriber using the upstream receive pattern.

44. A cellular communication system comprising cells, each of which includes a base station comprising:

an antenna system configured to provide a downstream transmit pattern partitioned into elevation sectors and an upstream receive pattern partitioned into azimuth sectors;

a transmitter connected to the antenna system to transmit a signal to a subscriber using the downstream transmit pattern; and

a receiver connected to the antenna system and configured to receive a signal from the subscriber using the upstream receive pattern.

45. The system of claim 44 further comprising a cell frequency reuse factor of at least 3.

46. The system of claim 44 further comprising a cell radius approximately equal to a design range of the cell divided by the square root of 3.

47. The system of claim 44 further comprising a cell radius approximately equal to a design range of the cell divided by 1.5.

48. The system of claim 44 further comprising a subscriber antenna configured to receive the signal from the base station.

49. The system of claim 48 wherein the subscriber antenna further comprises a directional receive antenna pattern.

50. The system of claim 49 wherein the directional receive antenna pattern is formed using adaptive beamforming.