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18 条记录 (耗时 0.014 秒)

    IMPROVEMENTS IN AND RELATING TO ANTENNAS
    1.
    发明公开
    IMPROVEMENTS IN AND RELATING TO ANTENNAS 审中-公开
    与天线相关的改进

    公开(公告)号：EP2932627A1

    公开(公告)日：2015-10-21

    申请号：EP13806049.6

    申请日：2013-12-13

    申请人： BAE SYSTEMS plc

    发明人： AITKEN, David, John ,  GILES, Simon, Charles ,  LONGSTONE,Robert, John, Mark ,  NAWAZ, Mohammed ,  SMITH, Andrew James ,  SCOTT, Michael, Andrew

    IPC分类号： H04B10/00 ,  G02B6/36 ,  H04J14/02

    CPC分类号： H04B10/25752 ,  G02B6/3604 ,  H01Q3/2676 ,  H04B10/516 ,  H04B10/801

    摘要： An optical signal transmission apparatus (1) for a rotating antenna comprising a plurality of optical modulators (6) arranged for receiving a respective plurality of analog RF signals (5) and for modulating a respective plurality of optical signals therewith to produce a plurality of modulated analog optical signals (8). A plurality of opto-electrical converters (14) each converts a respective modulated analog optical signal (13) into an analog electrical signal. The plurality of optical modulators (6) are rotationally coupled in optical communication with the plurality of opto-electrical converters (14) via an optical rotary joint (10) including a reversion prism.

    摘要翻译： 一种用于旋转天线的光学信号传输装置（1），包括多个光学调制器（6），用于接收相应的多个模拟RF信号（5）并用于调制相应的多个光学信号以产生多个调制 模拟光信号（8）。 多个光电转换器（14）各自将相应的调制模拟光信号（13）转换成模拟电信号。 多个光学调制器（6）经由包括返回棱镜的光学旋转接头（10）与多个光电转换器（14）光学连通地旋转耦合。

    ANTENNA DIVERSITY APPARATUS
    3.
    发明公开
    ANTENNA DIVERSITY APPARATUS 有权
    ANTENNENUMSCHALTUNGSVORRICHTUNG

    公开(公告)号：EP3038274A1

    公开(公告)日：2016-06-29

    申请号：EP16155026.4

    申请日：2011-01-31

    申请人： BAE Systems PLC

    发明人： PESCOD, Christopher Ralph ,  MATTHEWS, James Christopher Gordon ,  SMITH, Andrew James

    IPC分类号： H04B7/06 ,  H04B7/08 ,  H01Q1/27 ,  H04B1/38 ,  H04B1/40 ,  H04W4/10 ,  H01Q1/24 ,  H04B1/00

    CPC分类号： H04B7/0608 ,  H01Q1/273 ,  H01Q21/28 ,  H04B1/385 ,  H04B7/082 ,  H04W76/45

    摘要： Apparatus for providing antenna diversity for a radio transmitter/receiver (TR) comprising measuring means for measuring relative received signal strengths in a plurality of antennas in a selectable frequency range, means for selecting the selectable frequency range according to a transmission frequency of the TR, and connecting means for connecting the antenna having the greatest received signal strength to the TR. The apparatus may be combined with a plurality of antennas to form a diversity antenna system, for example for use with a personal radio. The antennas may then be disposed spaced apart on the user's body e.g. by being incorporated into a garment.

    摘要翻译： 一种用于为无线电发射机/接收机（TR）提供天线分集的设备，包括测量装置，用于测量可选频率范围内的多个天线中的相对接收信号强度，用于根据所述TR的传输频率选择所述可选频率范围的装置， 以及用于将具有最大接收信号强度的天线连接到TR的连接装置。 该装置可以与多个天线组合以形成例如用于个人无线电的分集天线系统。 天线然后可以被布置在使用者的身体上间隔开。 通过被并入服装。

    RADIO FREQUENCY COMMUNICATION
    4.
    发明公开
    RADIO FREQUENCY COMMUNICATION 有权
    无线电频率通信

    公开(公告)号：EP2737634A2

    公开(公告)日：2014-06-04

    申请号：EP12753791.8

    申请日：2012-07-26

    申请人： BAE Systems PLC

    发明人： PESCOD, Christopher Ralph ,  SMITH, Andrew James ,  NAWAZ, Shahbaz

    IPC分类号： H04B1/38 ,  H04B1/52

    CPC分类号： H04N7/20 ,  H04B1/3827 ,  H04B1/525 ,  H04N5/38

    摘要： A point-to-point radio frequency, RF, communication system (1); e.g. for outside broadcast, comprising: one or more communication units (6) coupled to respective television cameras(4) and displays(5); and a further communication unit (8); wherein the units (6) transmit video data to the further communication unit (8) at frequencies greater than or equal to 50 GHz and at data rates greater than or equal to 1 gigabit/second; and the units (6) receive video data transmitted by the further communication unit (8) at frequencies greater than or equal to 50 GHz and at data rates 250 megabits/second;the units (6) each comprise an antenna (12) used for both receiving and transmitting coupled to an arrangement comprising a waveguide diplexer (34) and an RF transceiver circuit board (32) having sufficient transmit/receive isolation for the transmitting and receiving to take place point-to-point at distances greater than or equal to km. 1

    摘要翻译： 点对点射频RF通信系统（1）; 例如 用于外部广播，包括：耦合到相应的电视摄像机（4）和显示器（5）的一个或多个通信单元（6）; 和另一个通信单元（8）; 其中所述单元（6）以大于或等于50GHz的频率和大于或等于1吉比特/秒的数据速率将视频数据传输到所述另一通信单元（8） 并且单元（6）以大于或等于50GHz的频率和250兆比特/秒的数据速率接收由另一通信单元（8）发送的视频数据;单元（6）各自包括用于 接收和发射两者都耦合到包括波导双工器（34）和RF收发器电路板（32）的装置，该装置具有足够的发射/接收隔离，用于发射和接收以发生点对点的距离大于或等于 公里。 1

    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS
    5.
    发明授权
    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS 有权
    方法控制光调制器偏置

    公开(公告)号：EP2845049B1

    公开(公告)日：2016-04-27

    申请号：EP13720510.0

    申请日：2013-04-30

    申请人： BAE Systems PLC

    发明人： SMITH, Andrew James ,  NAWAZ, Mohammed

    IPC分类号： G02F1/01 ,  G02F1/225 ,  H04B10/50

    CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/50575 ,  H04B10/50595

    摘要： Methods and apparatus for controlling a bias voltage (20) supplied to an optical modulator that comprises a biasable component configurable to be biased by application of the bias voltage (20), the method comprising: providing a target for the modulator output power; applying, to the biasable component, a bias voltage (20) that biases the biasable component so that the output power is within a pre-defined range of the target; monitoring the output power and, if the output power of the modulator is determined to be outside the pre-defined range, varying the value of the bias voltage (20) to bring the output power back within the pre-defined range; and monitoring the optical input to the modulator and, if it has been disabled, maintaining the bias voltage (20) at its current level for a pre-determined length of time that is dependent upon how long the modulator has been operating at quadrature.

    FINDING BIAS VOLTAGES FOR OPTICAL MODULATORS
    6.
    发明公开
    FINDING BIAS VOLTAGES FOR OPTICAL MODULATORS 有权
    DYNAMISCHE VORSPANNUNGSSTEUERUNGFÜROPTISCHE MACH-ZEHNDER MODULATOREN

    公开(公告)号：EP2845050A1

    公开(公告)日：2015-03-11

    申请号：EP13720511.8

    申请日：2013-04-30

    申请人： BAE Systems PLC

    发明人： SMITH, Andrew James ,  NAWAZ, Mohammed ,  GILES, Simon, Charles

    IPC分类号： G02F1/01 ,  G02F1/21 ,  G02F1/225

    CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212

    摘要： Methods and apparatus for finding a bias voltage (20) corresponding to a quadrature point of an optical modulator, the modulator comprising a biasable component which is configurable to be biased by application of the bias voltage (20) such that the modulator operates at quadrature, the method comprising: providing a target for the output power of the modulator which corresponds to quadrature; applying, to the biasable component, a bias voltage (20) having an initial value; thereafter,finding a value for the bias voltage (20) that biases the biasable component such that the output power of the modulator is within a pre- defined range of the target by, starting at the initial value, alternately increasing and decreasing(or decreasing and increasing)the bias voltage (20) with gradually increasing amplitude; and identifying the found value for the bias voltage (20) as a bias voltage corresponding to a quadrature point of the optical modulator.

    摘要翻译： 用于找到对应于光调制器的正交点的偏置电压（20）的方法和装置，所述调制器包括可偏置组件，其可配置为通过施加偏置电压（20）而被偏置，使得调制器以正交方式操作， 该方法包括：提供对应于正交的调制器的输出功率的目标; 向所述可偏压部件施加具有初始值的偏置电压（20）; 此后，找到偏置偏置电压（20）的值，该偏置电压（20）偏置可偏置分量，使得调制器的输出功率在目标的预定义范围内，从初始值开始交替地增加和减少（或减小） 并增加振幅的偏置电压（20）; 以及将所述偏置电压（20）的发现值识别为对应于所述光学调制器的正交点的偏置电压。

    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS
    7.
    发明公开
    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS 有权
    控制光调制器的偏置电压

    公开(公告)号：EP2845049A1

    公开(公告)日：2015-03-11

    申请号：EP13720510.0

    申请日：2013-04-30

    申请人： BAE Systems PLC

    发明人： SMITH, Andrew James ,  NAWAZ, Mohammed

    IPC分类号： G02F1/01 ,  G02F1/225 ,  H04B10/50

    CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/50575 ,  H04B10/50595

    摘要： Methods and apparatus for controlling a bias voltage (20) supplied to an optical modulator that comprises a biasable component configurable to be biased by application of the bias voltage (20), the method comprising: providing a target for the modulator output power; applying, to the biasable component, a bias voltage (20) that biases the biasable component so that the output power is within a pre-defined range of the target; monitoring the output power and, if the output power of the modulator is determined to be outside the pre-defined range, varying the value of the bias voltage (20) to bring the output power back within the pre-defined range; and monitoring the optical input to the modulator and, if it has been disabled, maintaining the bias voltage (20) at its current level for a pre-determined length of time that is dependent upon how long the modulator has been operating at quadrature.

    摘要翻译： 用于控制提供给光调制器的偏置电压（20）的方法和装置，所述光调制器包括可配置为通过施加偏置电压（20）而偏置的可偏置部件，所述方法包括：提供调制器输出功率的目标; 向可偏置部件施加偏置可偏置部件的偏置电压（20），使得输出功率在目标的预定义范围内; 监视输出功率，并且如果调制器的输出功率被确定为在预定范围之外，则改变偏置电压（20）的值以使输出功率返回到预定范围内; 以及监视到调制器的光输入，并且如果它已被禁用，则将偏置电压（20）保持在其当前电平一段预定的时间长度，这取决于调制器在正交操作多长时间。