公开(公告)号：US10854942B2

公开(公告)日：2020-12-01

申请号：US16272834

申请日：2019-02-11

Applicant: Cambium Networks Limited

Inventor： Paul Clark ,  Peter Strong ,  Carl Morrell ,  Adam Wilkins ,  Nigel Jonathan Richard King

IPC: H01P5/02 ,  H01P3/08 ,  H05K1/02

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 aperture is partially filled with a solid dielectric material and partially filled with air. 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.

公开(公告)号：US20180331745A1

公开(公告)日：2018-11-15

申请号：US16041321

申请日：2018-07-20

Applicant: Cambium Networks Limited

Inventor： Peter Strong

IPC: H04B7/06 ,  H04L27/26 ,  H04B17/11 ,  H04B7/0452

CPC classification number: H04B7/0682 ,  H04B7/0452 ,  H04B7/0617 ,  H04B17/102 ,  H04B17/11 ,  H04L27/26 ,  H04L27/2601

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.

公开(公告)号：US20190334589A1

公开(公告)日：2019-10-31

申请号：US16505282

申请日：2019-07-08

Applicant: Cambium Networks Limited

Inventor： Peter Strong

IPC: H04B7/0452 ,  H04B7/06 ,  H04L5/00 ,  H04B7/10

Abstract: In a multi user multiple input multiple output MU-MIMO wireless communication network comprising an access point and subscriber modules, a method of channel sounding comprises forming a respective MU-MIMO beam from the access point to each subscriber module of a first sounding group of subscriber modules by applying a beamforming weightset to a weighting matrix, the beamforming weightset determined based on previously determined channel estimates. Each MU-MIMO beam is used to transmit a respective sounding symbol, each respective sounding symbol being different from each other sounding symbol of the first sounding group. A first sounding symbol is received at a first subscriber module of the first sounding group, and it is determined whether to send a response message to the access point on the basis of a determination of a received level of interference to the first sounding symbol.

公开(公告)号：US20160240908A1

公开(公告)日：2016-08-18

申请号：US14839296

申请日：2015-08-28

Applicant: Cambium Networks Limited

Inventor： Peter Strong ,  Adam Wilkins ,  Carl Morrell ,  Paul Clark ,  Nigel Jonathan Richard King

IPC: H01P5/02

CPC classification number: H01P5/028 ,  H01P3/081 ,  H05K1/0225 ,  H05K1/0239 ,  H05K1/025

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.

Abstract translation: 射频传输装置包括具有孔的接地板，该孔包括具有细长横截面和基本上平行的侧面的槽，以及第一和第二传输线。 接地板的厚度大于槽的宽度。 第一传输线包括在接地板的第一侧上的第一细长导体，并且端部具有第一端接短截线。 第二传输线包括位于接地板的相对侧上的第二细长导体，并且端部具有第二端接短截线。 第一传输线布置成在与第一端接短截线相邻的点处穿过槽，并且第二传输线被布置成在与第二端接短截线相邻的点处与槽交叉。

公开(公告)号：US20190356365A1

公开(公告)日：2019-11-21

申请号：US16528995

申请日：2019-08-01

Applicant: Cambium Networks Limited

Inventor： Peter Strong

IPC: H04B7/0456 ,  H04B7/0452 ,  H04L25/02 ,  H04L5/14 ,  G01C19/00 ,  H04B7/06 ,  G01P15/18 ,  G01C21/18

Abstract: Methods and apparatuses for beam pattern stabilisation 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.

公开(公告)号：US10389416B2

公开(公告)日：2019-08-20

申请号：US15175204

申请日：2016-06-07

Applicant: Cambium Networks Limited

Inventor： Peter Strong

IPC: H04B7/0456 ,  H04L5/14 ,  H04B7/06 ,  G01C19/00 ,  G01C21/18 ,  G01P5/18 ,  H04L25/02 ,  H04B7/0452 ,  G01P15/18 ,  H04B7/10

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.

公开(公告)号：US09837697B2

公开(公告)日：2017-12-05

申请号：US14839296

申请日：2015-08-28

Applicant: Cambium Networks Limited

Inventor： Peter Strong ,  Adam Wilkins ,  Carl Morrell ,  Paul Clark ,  Nigel Jonathan Richard King

IPC: H01P5/02 ,  H01P3/08 ,  H05K1/02

CPC classification number: H01P5/028 ,  H01P3/081 ,  H05K1/0225 ,  H05K1/0239 ,  H05K1/025

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.

公开(公告)号：US20150215013A1

公开(公告)日：2015-07-30

申请号：US14166489

申请日：2014-01-28

Applicant: Cambium Networks Limited

Inventor： Peter Strong ,  John F. Ley

IPC: H04B7/04 ,  H04B7/10

CPC classification number: H04B7/0452 ,  H04B7/0602 ,  H04B7/0805 ,  H04B7/0834 ,  H04B7/10 ,  H04W88/02

Abstract: In a multi-user multiple input multiple output (MU-MIMO) wireless network comprising an access point and several subscriber modules, a subscriber module configured with a single transceiver and two antennas elements operates a polarization switch to cause one of the two antenna elements to be connected with the single transceiver. The polarization switch may be operated in response to receiving a command from the access point. A scheduler in the access point is configured to send the command to cause the subscriber module to operate the polarization switch.

Abstract translation: 在包括接入点和多个用户模块的多用户多输入多输出（MU-MIMO）无线网络中，配置有单个收发器和两个天线元件的用户模块操作偏振开关，以使两个天线元件之一 与单个收发器连接。 响应于从接入点接收到命令，偏振开关可以被操作。 接入点中的调度器被配置为发送命令以使用户模块操作偏振切换器。

公开(公告)号：US10707942B2

公开(公告)日：2020-07-07

申请号：US16510319

申请日：2019-07-12

Applicant: Cambium Networks Limited

Inventor： Peter Strong

IPC: H04B7/06 ,  H04B17/11 ,  H04B7/0452 ,  H04L27/26 ,  H04B17/10

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.

公开(公告)号：US20190190110A1

公开(公告)日：2019-06-20

申请号：US16272834

申请日：2019-02-11

Applicant: Cambium Networks Limited

Inventor： Paul Clark ,  Peter Strong ,  Carl Morrell ,  Adam Wilkins ,  Nigel Jonathan Richard King

IPC: H01P3/08 ,  H05K1/02

CPC classification number: H01P3/081 ,  H01P5/028 ,  H05K1/0237 ,  H05K2201/09209 ,  H05K2201/10242

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 aperture is partially filled with a solid dielectric material and partially filled with air. 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.