Single band dual concurrent network device

• US 10,003,134 B2
• Filed: 06/13/2017
• Issued: 06/19/2018
• 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, Liu, Changming, Cao, Zhenye
• Primary Examiner(s): Nguyen, Hoang
• Application Number:
  US15/622,003
• Publication Number:
  US 20170302007A1
• Time in Patent Office: 371 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;

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;

a housing configured to contain the first radio module, the first antenna array, the second radio module, and the second antenna array;

wherein, in operation, the first radio module and the second radio module function concurrently within the housing 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, and at least one of the first radio module and the second radio module is wirelessly coupled through a Wi-Fi connection to an end user device acting as a station in accessing network services of a network over, at least in part, the Wi-Fi connection.

2. The network device of claim 1, wherein the first frequency band is the 5 GHz frequency band.

3. The network device of claim 1, wherein the first radio module and the second module are configured to transmit and receive the first radio signals and the second radio signals in compliance with the IEEE 802.11 standard.

4. The network device of claim 1, wherein one of either the first plurality of polarized antennas and the second plurality of polarized antennas are vertically polarized with respect to the network device.

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

6. 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.

7. The network device of claim 1, wherein either or both of the first radio module and the second radio module are adjustable to transmit and receive signals in a second frequency band.

8. The network device of claim 1, wherein either or both of the first radio module and the second radio module are adjustable to transmit and receive signals in either the 2.4 GHz frequency band and the 5 GHz frequency band.

9. The network device of claim 1, wherein either or both of the first radio module and the second radio module are adjustable to transmit and receive signals in either the 3.6 GHz frequency band and the 5 GHz frequency band.

10. The network device of claim 1, wherein the first radio module and the second radio module are mounted on a main printed circuit board contained within the housing.

11. The network device of claim 1, wherein the first antenna array includes vertically polarized antennas positioned to have a +45°

phase offset with respect to a center of the network device and the second array includes horizontally polarized antennas positioned to have a −

45°

phase offset with respect to the center of the network device.

12. The network device of claim 1, wherein either or both the first antenna array and the second antenna array are integrated as part of the housing.

13. The network device of claim 1 further comprising:

low noise amplifiers coupled to the first antenna array and the second antenna array;

wherein, in operation, gains of the low noise amplifiers are dynamically adjusted to increase a dynamic range of the first radio module and the second radio module.

14. The network device of claim 1 further comprising:

low noise amplifiers coupled to the first antenna array and the second antenna array;

wherein, in operation, gains of the low noise amplifiers are dynamically adjusted using either or both a bypass circuit and post low noise amplifier attenuation to increase a dynamic range of the first radio module and the second radio module.

15. The network device of claim 1, wherein the housing has a footprint that is less than or equal to 40 cm by 40 cm.

16. A network device comprising:

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

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

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

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

a housing configured to contain the first radio module, the first polarized antenna, the second radio module, and the second polarized antenna;

wherein, in operation, the first radio module and the second radio module function concurrently within the housing by transmitting the first radio signals and the second radio signals 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, and at least one of the first radio module and the second radio module is wirelessly coupled through a Wi-Fi connection to an end user device acting as a station in accessing network services of a network over, at least in part, the Wi-Fi connection.

17. The network device of claim 16, wherein the housing has a footprint that is less than or equal to 40 cm by 40 cm.

18. A network device comprising:

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

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

a housing configured to contain the first radio module, the first polarized antenna, the second radio module, and the second polarized antenna;

wherein, in operation, the first radio module and the second radio module function concurrently within the housing by receiving the first radio signals and the second radio signals 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, and at least one of the first radio module and the second radio module is wirelessly coupled through a Wi-Fi connection to an end user device acting as a station in accessing network services of a network over, at least in part, the Wi-Fi connection.

19. The network device of claim 18, wherein the housing has a footprint that is less than or equal to 40 cm by 40 cm.