Patents Assigned to Cambium Networks Limited
  • Publication number: 20190297521
    Abstract: In a radio device, an automatic repeat request circuit communicates data messages to remote radio devices at selected data rates. Responses to the data messages are collected and statistics developed about success rates of the data messages at the selected data rates. A current data rate is selected based on the statistics and a packet is transmitted. The data rate can be adapted using the statistics about success rates of the data messages.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 26, 2019
    Applicant: CAMBIUM NETWORKS LIMITED
    Inventors: Daniel Sullivan, Oleksandr Andrusenko, Sergii Topchii
  • Patent number: 10389416
    Abstract: Methods and apparatuses for beam pattern stabilization are provided. A method may include processing an output of a gyroscopic sensor to generate a plurality of first phase corrections for a first time interval and a plurality of second phase corrections for a second time interval. The method may further include measuring respective signal propagation characteristics between each antenna element of the array and each of a first and second subscriber module for the first time interval. The method may further include forming, based on the measured respective signal propagation characteristics, the plurality of first phase corrections, and the plurality of second phase corrections, a MU-MIMO beam pattern for the second time interval having a main lobe towards the first subscriber module and a null towards the second subscriber module, whereby to correct for a change in orientation of the array between the first time interval and the second time interval.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: August 20, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventor: Peter Strong
  • Patent number: 10355764
    Abstract: An access point of a wireless communication network forms beams by applying a weightset for a beamforming weights matrix to signal streams. The Equivalent Isotropic Radiated Power (EIRP) that is emitted from an array of antenna elements at the access point is controlled by calibrating the transmission phase and gain of a respective transmit chain for each antenna element, providing a polar radiation model for an antenna element of the array, and determining a weightset for the weighting matrix subject to a constraint that a maximum total EIRP for the beams in combination in any azimuth direction is maintained within a predetermined EIRP limit, based at least on a spatial separation of the antenna elements, the polar radiation model and the calibrated transmission phase and gain of each respective transmit chain.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: July 16, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventor: Peter Strong
  • Patent number: 10321350
    Abstract: In a radio device, an automatic repeat request circuit communicates data messages to remote radio devices at selected data rates. Responses to the data messages are collected and statistics developed about success rates of the data messages at the selected data rates. A current data rate is selected based on the statistics and a packet is transmitted. The data rate can be adapted using the statistics about success rates of the data messages.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: June 11, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Daniel Sullivan, Oleksandr Andrusenko, Sergii Topchii
  • Patent number: 10224624
    Abstract: An antenna array assembly comprises a ground plate, an array of radiator elements disposed in a spaced relationship with a first face of the ground plate between first and second substantially parallel conductive walls projecting from the first face of the ground plate, and a first and second conductive plate. Each of the first and second conductive plates is electrically isolated from the ground plate, and each is disposed in an upstanding relationship to the first face of the ground plate in a substantially parallel relationship with the first and second conductive walls. This provides reduced radiation in at least one direction in the hemisphere on the opposite side of the ground plate to the first face.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: March 5, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Deepu Nair, Nigel King, Neeraj Kumar Maurya
  • Patent number: 10211504
    Abstract: A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 19, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Peter Strong, Adam Wilkins, Carl Morrell, Paul Clark, Nigel Jonathan Richard King
  • Patent number: 10069203
    Abstract: An aperture coupled patch antenna element comprises a ground plate having an aperture passing through the ground plate from a first side to a second opposite side. The aperture comprises a slot having an elongate cross-section, the cross-section having substantially parallel sides extending along the length of the cross-section. The antenna element also comprises a first transmission line comprising a first elongate conductor disposed on the first side of the ground plate in a substantially parallel relationship with the first side of the ground plate, and a patch radiator disposed on the second side of the ground plate in a substantially parallel relationship with the second side of the ground plate, the first transmission line being arranged to cross the slot, and the patch radiator being arranged to overlie the slot. The thickness of the ground plate at the slot is greater than the width of the slot.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: September 4, 2018
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Deepu Nair, Nigel King, Neeraj Kumar Maurya
  • Patent number: 9948237
    Abstract: Devices and methods are disclosed for generating, filtering, and amplifying signals that are sent and received using SOCs. These improved methods and devices advantageously provide filtering of composite RF signals such that the RF signals can be transmitted with an improved SNR. Such filtered signals can then be transmitted at a higher power. Because filtering is performed at an intermediate frequency, the higher cost of low-noise RF-transmitters and/or RF filtering components can be avoided. Accordingly, less expensive (e.g., noisier) components, such as readily available wireless transceiver SOCs, can be used for generating RF signals, filtering the signals, and then transmitting the filtered signals at higher power. As a result of these devices and methods, inexpensive SOCs may be used at higher powers and over longer ranges than would be normally expected.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: April 17, 2018
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Scott R. Anderson, Ted J. Beck
  • Publication number: 20180034815
    Abstract: Encryption is provided for a wireless network comprising a first wireless station and at least a second wireless station. First messages are exchanged between the first wireless station and the second wireless station over a first synchronous wireless link to establish a shared secret and a first session key, the first messages not being encrypted. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the first session key, then further messages are exchanged between the first wireless station and the second wireless station over the first synchronous wireless link to establish a second session key, the further messages being encrypted by the encryption of the MAC layer of the first synchronous wireless link. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the second session key.
    Type: Application
    Filed: July 26, 2017
    Publication date: February 1, 2018
    Applicant: Cambium Networks Limited
    Inventors: Mark Thomas, Richard Carter, Gregor Dean
  • Patent number: 9837697
    Abstract: A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: December 5, 2017
    Assignee: Cambium Networks Limited
    Inventors: Peter Strong, Adam Wilkins, Carl Morrell, Paul Clark, Nigel Jonathan Richard King
  • Patent number: 9750034
    Abstract: In a communication system, an access point in communication with one or more stations identifies a first subset of wireless stations from the set of wireless stations. The first subset of wireless stations is identified based on RSSI values for radio frequency signals received from each of the stations exceeding an RSSI threshold. The first subset of wireless stations is assigned to a first reception window. The access point transmits an identifier of each of the subset of wireless stations and an identifier of the reception window via the radio frequency channel.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 29, 2017
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Ashraf Nusairat, Basman Dahleh
  • Patent number: 9716320
    Abstract: Devices describe herein are configured to radiate radio frequency (RF) energy corresponding to RF signals from a first range of frequencies. The device comprises a patch antenna assembly comprising a microstrip disposed on a printed circuit board and a patch antenna. The device also includes a transmitter configured to generate RF signals from the first range of frequencies at an output of the transmitter and a center feed assembly comprising a waveguide, a lens and the patch antenna assembly disposed in the waveguide. The center feed assembly is configured to radiate from the lens radio frequency (RF) energy corresponding to RF signals from first range of frequencies at a power level greater than the first power level.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: July 25, 2017
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: John Francis Ley, Carsten Claus Gruettner
  • Patent number: 9680415
    Abstract: Devices and methods are disclosed for generating, filtering, and amplifying signals that are sent and received using SOCs. These improved methods and devices advantageously provide filtering of composite RF signals such that the RF signals can be transmitted with an improved SNR. Such filtered signals can then be transmitted at a higher power. Because filtering is performed at an intermediate frequency, the higher cost of low-noise RF-transmitters and/or RF filtering components can be avoided. Accordingly, less expensive (e.g., noisier) components, such as readily available wireless transceiver SOCs, can be used for generating RF signals, filtering the signals, and then transmitting the filtered signals at higher power. As a result of these devices and methods, inexpensive SOCs may be used at higher powers and over longer ranges than would be normally expected.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: June 13, 2017
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Scott R. Anderson, Ted J. Beck
  • Patent number: 9600986
    Abstract: A signalling system comprises a first data signal source (10, 14), a first data signal receiver (12, 16) and a cable 18 comprising two or more wire pairs ({1,2}, {3,6}, {4,5}, {7,8}) coupling the first data signal source to the first data signal receiver. A portion of each wire pair is wound around a magnetic core (28). A further winding (30) is wound around the core (28). A further signal source (24) is coupled to the further winding (30) and a further receiver (36, 26) is coupled to the wires to receive the further signal. The windings around the core apply the further signal to the wire pairs as a common-mode signal. This allows the further signal to be transmitted to the further receiver without affecting the signal transmitted between the source (10, 14) and the receiver (12, 16) and with only minor modification of the cable (18).
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: March 21, 2017
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventor: Alexander Kidger
  • Patent number: 9509032
    Abstract: A radio frequency transmission arrangement comprises a ground plate (8) having first and second opposite sides and a boss protruding from said second side of the ground plate (8), a first transmission line comprising a first elongate conductor (1) passing from the first side of the ground plate through an aperture (3) in the ground plate and the boss, and a second transmission line comprising a second elongate conductor (2) and a ground plane (6), the first elongate conductor (1) passing through the ground plane (6) to connect to the second elongate conductor. The boss has an end surface (4) disposed in a substantially parallel relationship with the ground plane (6) of the second transmission line, and there is a gap between the end surface of the boss and the ground plane.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: November 29, 2016
    Assignee: Cambium Networks Limited
    Inventors: Adam Wilkins, Carl Morrell, Paul Clark, Peter Spence, Nigel Jonathan Richard King
  • Publication number: 20160057647
    Abstract: In a radio device, an automatic repeat request circuit communicates data messages to remote radio devices at selected data rates. Responses to the data messages are collected and statistics developed about success rates of the data messages at the selected data rates. A current data rate is selected based on the statistics and a packet is transmitted. The data rate can be adapted using the statistics about success rates of the data messages.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 25, 2016
    Applicant: CAMBIUM NETWORKS LIMITED
    Inventors: Daniel Sullivan, Oleksandr Andrusenko, Sergii Topchii
  • Patent number: 9253745
    Abstract: In a communication system, an access point in communication with one or more stations is configured to shift the start of transmission of its downlink data. The access point may automatically shift the transmission of the downlink data in response to receiving downlink data transmitted by a neighboring access point. Shifting the start of transmission of its downlink data permits stations to correctly synchronize to the downlink data. The transmission of data may be synchronized to a synchronization event. In some instances, the access point updates its downlink data with a value corresponding to the shift. The access point may not shift the transmission of the downlink data if the signal strength of the received downlink data is below a threshold.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: February 2, 2016
    Assignee: Cambium Networks Limited
    Inventors: Ashraf Nusairat, Basman Dahleh
  • Patent number: 9214730
    Abstract: A patch antenna comprises a patch radiator, at least a first connection point for at least a first radio frequency signal, and at least a first feed structure. The first feed structure is arranged to connect the first connection point to at least two feed points on the patch radiator, a first of the feed points being disposed adjacent to a first edge of the patch radiator, and a second of the feed points being disposed adjacent to a second edge of the patch radiator, the first and second edges being on opposed sides of a central region of the patch radiator. The first feed structure comprises at least a first transmission line arranged to connect the first of the feed points to the second of the feed points, the transmission line being disposed in a substantially parallel relationship to the patch radiator.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: December 15, 2015
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventor: John Ley
  • Publication number: 20150317886
    Abstract: A signalling system comprises a first data signal source (10, 14), a first data signal receiver (12, 16) and a cable 18 comprising two or more wire pairs ({1,2}, {3,6}, {4,5}, {7,8}) coupling the first data signal source to the first data signal receiver. A portion of each wire pair is wound around a magnetic core (28). A further winding (30) is wound around the core (28). A further signal source (24) is coupled to the further winding (30) and a further receiver (36, 26) is coupled to the wires to receive the further signal. The windings around the core apply the further signal to the wire pairs as a common-mode signal. This allows the further signal to be transmitted to the further receiver without affecting the signal transmitted between the source (10, 14) and the receiver (12, 16) and with only minor modification of the cable (18).
    Type: Application
    Filed: June 24, 2015
    Publication date: November 5, 2015
    Applicant: Cambium Networks Limited
    Inventor: Alexander Kidger
  • Patent number: 9131509
    Abstract: In a wireless communication network, to reduce the polling overhead it is proposed to poll several stations using the same polling frame. In order to be able to poll more than one station in the same frame, an access point can make use of the locations of stations relative to the access point. The location of each station relative to the access point will cause a different propagation delay for radio communications between the station and the access point. Based on the propagation delays, two or more stations may be grouped together for subsequent transmissions to the access point.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: September 8, 2015
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Mohammad Isam Malkawi, Ashraf Nusairat, Basman Dahleh