Dual hemisphere antenna

• US 7,202,824 B1
• Filed: 10/15/2003
• Issued: 04/10/2007
• Est. Priority Date: 10/15/2003
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Theobold, David M., Saliga, Stephen V., Sanelli, John
• Primary Examiner(s): Dinh; Trinh
• Assistant Examiner(s): MANCUSO, HUEDUNG XUAN CAO
• Application Number:
  US10/686,233
• Time in Patent Office: 1,273 Days
• Field of Search: 343/702, 343/893, 343/841, 343/907, 343/912, 343/832, 343/833, 343/834, 343/835, 343/836
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/523 between antennas of an array
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H01Q 9/20 Two collinear substantially straight active elements; Substantially straight single active elements H01Q9/28 takes precedence

Abstract

A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. One or more conductive members are included, having an edge displaced from and substantially directed toward the at least one antenna element, and cooperating therewith to establish a multiplicity of hemispherical beam patterns for a wireless signal. Embodiments with a multiplicity of antenna elements exhibit a high degree of isolation between said antenna elements.

Claims

1. An antenna system, comprising:

at least one plurality of antenna elements for sending and receiving a wireless signal; and

at least one conductive member, having edges displaced from and substantially directed toward the at least one plurality of antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns;

wherein the at least one conductive member comprises a plurality of non-intersecting conductive members wherein each conductive member is associated with at least one plurality of antenna element.

2. The antenna system of claim 1 wherein the plurality of conductive members comprise first and second conductive members, located at a substantially perpendicular angle.

3. The antenna system of claim 2 wherein each conductive member is associated with a pair of antenna elements, disposed at respective opposite ends of the respective conductive member.

4. The antenna system of claim 3 wherein the pair of antenna elements associated with the first conductive member are adapted to operate in a first wireless frequency band and the pair of antenna elements associated with the second conductive member are adapted to operate in a second wireless frequency band.

5. The antenna system of claim 4 wherein the first and second wireless frequency bands are 2.4 GHz and 5 GHz wireless bands.

6. An antenna system, comprising:

a plurality of antenna elements for sending and receiving a wireless signal; and

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns;

wherein the at least one conductive member comprises a substantially angled member.

7. The antenna system of claim 6 wherein the substantially contoured member is an angled member having a vertex edge substantially directed toward the at least one antenna element.

8. An antenna system, comprising:

a plurality of antenna elements for sending and receiving a wireless signal;

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns; and

a sandwich module for providing a further level of antenna isolation.

9. The antenna system of claim 8 wherein the sandwich module comprises metal plates that substantially face the at least one conductive member at a perpendicular angle.

10. The antenna system of claim 8 where the sandwich module comprises a separation material having RF isolating properties, for providing a further level of antenna isolation.

11. An antenna system, comprising:

a plurality of antenna elements for sending and receiving a wireless signal; and

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns;

wherein the antenna element is shorter than the respective edge of the conductive member.

12. A wireless device, comprising:

a radio transceiver comprising a plurality of radio components for processing a wireless signal;

a plurality of antenna elements for sending and receiving a wireless signal; and

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns for the wireless signal;

wherein the at least one conductive member comprises a plurality of non-intersecting conductive members wherein each conductive member is associated with at least one antenna element.

13. The wireless device of claim 12 wherein the plurality of conductive members comprise first and second conductive members, located at a substantially perpendicular angle.

14. The wireless device of claim 13 wherein each conductive member is associated with a pair of antenna elements, disposed at respective opposite ends of the respective conductive member.

15. The wireless device of claim 14 wherein the pair antenna elements associated with the first conductive member are adapted to operate on a first wireless frequency band and the pair of antenna elements associated with the second conductive member are adapted to operate on a second wireless frequency band.

16. The wireless device of claim 15 wherein the first and second wireless frequency bands are 2.4 GHz and 5 GHz wireless bands.

17. A wireless device, comprising:

a radio transceiver comprising a plurality of radio components for processing a wireless signal;

a plurality of antenna elements for sending and receiving a wireless signal; and

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns for the wireless signal;

wherein the at least one conductive member comprises a substantially angled member.

18. The wireless device of claim 17 wherein the substantially contoured member is an angled member having a vertex edge substantially directed toward the at least one antenna element.

19. The wireless device of claim 17 wherein the sandwich module comprises metal plates that substantially face the at least one conductive member at a perpendicular angle.

20. The wireless device of claim 17 where the sandwich module comprises a separation material having RF isolating properties, for providing a further level of antenna isolation.

21. A wireless device, comprising:

a radio transceiver comprising a plurality of radio components for processing a wireless signal;

a plurality of antenna elements for sending and receiving a wireless signal;

at least one conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns for the wireless signal; and

a sandwich module for providing a further level of antenna isolation.

22. A wireless device, comprising:

a radio transceiver comprising a plurality of radio components for processing a wireless a plurality of active antenna elements for sending and receiving a wireless signal;

at least one passive conductive member, having edges displaced from and substantially directed toward the plurality of active antenna elements, and cooperating therewith to establish a plurality of hemispherical beam patterns for the wireless signal; and

wherein the antenna element is shorter than the respective edge of the conductive member.