Single band dual concurrent network device

• US 9,705,207 B2
• Filed: 09/03/2015
• Issued: 07/11/2017
• Est. Priority Date: 03/11/2015
• Status: Active Grant

• Current Assignee: Extreme Networks, Inc.
• Original Assignee: Aerohive Networks Incorporated (Extreme Networks, Inc.)
• Inventors: Zhang, Liangfu, Chen, George Gang, Cao, Zhenye, Liu, Changming
• Primary Examiner(s): Nguyen, Hoang
• Application Number:
  US14/845,006
• Publication Number:
  US 20160268697A1
• Time in Patent Office: 677 Days
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

A network device comprising, a first radio module configured to transmit and receive first radio signals in a first frequency band, a first antenna array configured to transmit and receive the first radio signals for the first radio module in the first frequency band, a second radio module configured to transmit and receive second radio signals in the first frequency band, a second antenna array configured to transmit and receive the second radio signals for the second radio module in the first frequency band, wherein, in operation, the first radio module and the second radio modules function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.

Claims

1. A network device comprising:

a first radio module configured to transmit and receive first radio signals in a first frequency band;

a first antenna array comprised of a first plurality of polarized antennas and configured to transmit and receive the first radio signals for the first radio module in the first frequency band, the first plurality of polarized antennas including a polarized antenna comprising;

a first conductive plate including a first antenna blade, a second antenna blade, and a third antenna blade;

a second conductive plate including a fourth antenna blade, a fifth antenna blade, and a sixth antenna blade;

the first conductive plate and the second conductive plate overlaying each other and coupled together at a central joint;

a second radio module configured to transmit and receive second radio signals in the first frequency band;

a second antenna array comprised of a second plurality of polarized antennas and configured to transmit and receive the second radio signals for the second radio module in the first frequency band;

wherein, in operation, the first radio module and the second radio module function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.

2. The network device of claim 1, wherein one of the first radio module or the second radio module is adjustable to transmit and receive radio signals in a second frequency band.

3. The network device of claim 1, wherein the first plurality of polarized antennas are vertically polarized with respect to the network device.

4. The network device of claim 1, wherein the second plurality of polarized antennas are horizontally polarized with respect to the network device.

5. The network device of claim 1, wherein the first plurality of polarized antennas are orthogonally polarized with respect to the second plurality of polarized antennas.

6. The network device of claim 1, further comprising a housing configured to contain the first radio module, the first antenna array, the second radio module, and the second antenna array, the housing having a footprint that is less than or equal to 40 cm by 40 cm.

7. The network device of claim 1, further comprising a main printed circuit board, wherein the first plurality of polarized antennas and the second plurality of polarized antennas are positioned at least 5 mm away from edges of the main printed circuit board.

8. The network device of claim 1, further comprising a main printed circuit board, wherein the first plurality of polarized antennas are vertically polarized with respect to the network device and are positioned at positions 30 mm out from edges of the main printed circuit board along a plane that extends out from the edges of the main printed circuit board.

9. The network device of claim 1, further comprising a main printed circuit board, wherein the second plurality of polarized antennas are horizontally polarized with respect to the network device and are positioned at positions 5 mm out from edges of the main printed circuit board along a plane that extends out from the edges of the main printed circuit board and 5 mm above or below the plane.

10. The network device of claim 1, further comprising an antenna plate, wherein the first plurality of polarized antennas and the second plurality of polarized antennas are mounted to the antenna plate.

11. The network device of claim 1, further comprising an antenna plate, wherein the first plurality of polarized antennas and the second plurality of polarized antennas are mounted to the antenna plate at positions at least 5 mm away from edges of the antenna plate.

12. The network device of claim 1, further comprising an antenna plate, wherein the first plurality of polarized antennas are vertically polarized with respect to the network device and the antenna plate is mounted such that the first plurality of polarized antennas are positioned at positions 30 mm out from edges of a main printed circuit board along a plane that extends out from the edges of the main printed circuit board.

13. The network device of claim 1, further comprising an antenna plate, wherein the second plurality of polarized antennas are horizontally polarized with respect to the network device and the antenna plate is mounted such that the second plurality of polarized antennas are positioned at positions 5 mm out from edges of a main printed circuit board along a plane that extends out from the edges of the main printed circuit board and 5 mm above or below the plane.

14. The network device of claim 1, further comprising low noise amplifiers coupled to the first plurality of polarized antennas and the second plurality of polarized antennas, wherein in operation, gains of the low noise amplifiers are modified to increase dynamic ranges of the first radio module and the second radio module.

15. The network device of claim 1, further comprising:

low noise amplifiers coupled to the first plurality of polarized antennas and the second plurality of polarized antennas;

bypass circuits coupled to the low noise amplifiers and configured to modify gains of the low noise amplifiers.

16. The network device of claim 1, further comprising:

low noise amplifiers coupled to the first plurality of polarized antennas and the second plurality of polarized antennas;

attenuators coupled to the low noise amplifiers and configured to modify gains of the low noise amplifiers.

17. The network device of claim 1, wherein a polarized antenna of the second plurality of polarized antennas comprises:

a first conductive plate including a first protrusion;

a second conductive plate including a second protrusion;

the first protrusion and the second protrusion extending out from the first conductive plate and the second conductive plate to form a channel between the first conductive plate and the second conductive plate.

18. A network device comprising:

a first radio module configured to transmit first radio signals in a first frequency band;

a first polarized antenna coupled to the first radio module and configured to transmit the first radio signals for the first radio module in the first frequency band, the first polarized antenna comprising;

a first conductive plate including a first antenna blade, a second antenna blade, and a third antenna blade;

a second conductive plate including a fourth antenna blade, a fifth antenna blade, and a sixth antenna blade;

the first conductive plate and the second conductive plate overlaying each other and coupled together at a central joint;

a second radio module configured to transmit second radio signals in the first frequency band;

a second polarized antenna coupled to the second radio module and configured to transmit the second radio signals for the second radio module in the first frequency band;

wherein, in operation, the first radio module and the second radio module function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first polarized antenna and the second polarized antenna.

19. A network device comprising:

a first radio module configured to receive first radio signals in a first frequency band;

a first polarized antenna coupled to the first radio module and configured to receive the first radio signals for the first radio module in the first frequency band;

a second radio module configured to receive second radio signals in the first frequency band;

a second polarized antenna coupled to the second radio module and configured to receive the second radio signals for the second radio module in the first frequency band, the second polarized antenna comprising;

a first conductive plate including a first protrusion;

a second conductive plate including a second protrusion;

the first protrusion and the second protrusion extending out from the first conductive plate and the second conductive plate to form a channel between the first conductive plate and the second conductive plate;

wherein, in operation, the first radio module and the second radio module function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first polarized antenna and the second polarized antenna.

20. A network device comprising:

a first radio module configured to transmit and receive first radio signals in a first frequency band;

a first antenna array comprised of a first plurality of polarized antennas and configured to transmit and receive the first radio signals for the first radio module in the first frequency band;

a second radio module configured to transmit and receive second radio signals in the first frequency band;

a second antenna array comprised of a second plurality of polarized antennas and configured to transmit and receive the second radio signals for the second radio module in the first frequency band, the second antenna array including a polarized antenna comprising;

a first conductive plate including a first protrusion;

a second conductive plate including a second protrusion;

the first protrusion and the second protrusion extending out from the first conductive plate and the second conductive plate to form a channel between the first conductive plate and the second conductive plate;

wherein, in operation, the first radio module and the second radio module function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.