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公开(公告)号：US09291835B2
公开(公告)日：2016-03-22
申请号：US14398238
申请日：2013-04-30
申请人： BAE SYSTEMS plc
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）而偏置，使得调制器以正交的方式工作， 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（或减少） 并增加振幅的偏置电压（20）; 以及将所述偏置电压（20）的所找到的值识别为对应于所述光学调制器的正交点的偏置电压。
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公开(公告)号：US09658476B2
公开(公告)日：2017-05-23
申请号：US14398241
申请日：2013-04-30
申请人： BAE SYSTEMS plc
CPC分类号： G02F1/0123 , G02F1/225 , G02F1/2255 , G02F2001/212
摘要： Methods and apparatus for controlling a bias voltage supplied to an optical modulator, the modulator comprising a biasable component, the biasable component being 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, the target for the output power of the modulator being an output power corresponding to the modulator operating at quadrature; applying, to the biasable component, a bias voltage (20) having an initial value of 0V; and, thereafter, varying the bias voltage (20) until the value of the bias voltage (20) is the value that is closest to the initial value and that biases the biasable component so that the output power of the modulator is within a pre-defined range of the target output power.
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公开(公告)号：US20150110436A1
公开(公告)日：2015-04-23
申请号：US14398241
申请日：2013-04-30
申请人： BAE SYSTEMS plc
CPC分类号： G02F1/0123 , G02F1/225 , G02F1/2255 , G02F2001/212
摘要： Methods and apparatus for controlling a bias voltage supplied to an optical modulator, the modulator comprising a biasable component, the biasable component being 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, the target for the output power of the modulator being an output power corresponding to the modulator operating at quadrature; applying, to the biasable component, a bias voltage (20) having an initial value of 0V; and, thereafter, varying the bias voltage (20) until the value of the bias voltage (20) is the value that is closest to the initial value and that biases the biasable component so that the output power of the modulator is within a pre-defined range of the target output power.
摘要翻译： 用于控制提供给光调制器的偏置电压的方法和装置，所述调制器包括可偏置部件，所述可偏置部件可被配置为通过施加所述偏置电压（20）而偏置，使得所述调制器以正交方式工作，所述方法包括： 提供调制器的输出功率的目标，调制器的输出功率的目标是对应于正交运算的调制器的输出功率; 将具有初始值0V的偏置电压（20）施加到所述可偏压部件; 然后改变所述偏置电压（20）直到所述偏置电压（20）的值是最接近所述初始值的值，并且偏置所述可偏置分量，使得所述调制器的输出功率在预调制器内， 定义范围的目标输出功率。
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公开(公告)号：US09762325B2
公开(公告)日：2017-09-12
申请号：US14651894
申请日：2013-12-13
申请人： BAE SYSTEMS plc
发明人： David John Aitken , Simon Charles Giles , Robert John Mark Longstone , Mohammed Nawaz , Andrew James Smith , Michael Andrew Scott
IPC分类号： H04B10/00 , H04B10/2575 , G02B6/36 , H01Q3/26 , H04B10/80 , H04B10/516
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.
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公开(公告)号：US09692583B2
公开(公告)日：2017-06-27
申请号：US14890337
申请日：2014-05-08
申请人： BAE SYSTEMS PLC
摘要： According to a first aspect of the present invention, there is provided a duplexer for a radio frequency antenna, comprising: a radio frequency signal transmitter port arranged for connection to a radio frequency signal transmitter; a radio frequency signal receiver port arranged for connection to a radio frequency signal receiver; a switch arranged selectively to adopt either one of: a first state which connects the transmitter port to a common input/output port of the switch arranged for connection to a radio frequency antenna; and a second state which connects the receiver port to the common input/output port; a switch control unit arranged to monitor radio frequency power at the common input/output port and to receive a transmission gate signal; wherein the switch control unit is arranged to control the switch to adopt the first state upon receipt of the transmission gate signal, and, subsequently, to control the switch to adopt the second state when the monitored radio frequency power falls below a threshold level.
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公开(公告)号：US20160182210A1
公开(公告)日：2016-06-23
申请号：US14890337
申请日：2014-05-08
申请人： BAE SYSTEMS PLC
摘要： According to a first aspect of the present invention, there is provided a duplexer for a radio frequency antenna, comprising: a radio frequency signal transmitter port arranged for connection to a radio frequency signal transmitter; a radio frequency signal receiver port arranged for connection to a radio frequency signal receiver; a switch arranged selectively to adopt either one of: a first state which connects the transmitter port to a common input/output port of the switch arranged for connection to a radio frequency antenna; and a second state which connects the receiver port to the common input/output port; a switch control unit arranged to monitor radio frequency power at the common input/output port and to receive a transmission gate signal; wherein the switch control unit is arranged to control the switch to adopt the first state upon receipt of the transmission gate signal, and, subsequently, to control the switch to adopt the second state when the monitored radio frequency power falls below a threshold level.
摘要翻译： 根据本发明的第一方面，提供了一种用于射频天线的双工器，包括：射频信号发射机端口，被布置为连接到射频信号发射机; 射频信号接收器端口，布置成连接到射频信号接收器; 选择性地选择性地采用以下任一方式的开关：将发送器端口连接到布置成用于连接到射频天线的开关的公共输入/输出端口的第一状态; 以及将接收器端口连接到公共输入/输出端口的第二状态; 开关控制单元，被配置为监视公共输入/输出端口的射频功率并接收传输门信号; 其中所述开关控制单元被布置成在接收到所述传输门信号时控制所述开关采用所述第一状态，并且随后在所述监视的射频功率低于阈值电平时控制所述开关采用所述第二状态。
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公开(公告)号：US20150124309A1
公开(公告)日：2015-05-07
申请号：US14398238
申请日：2013-04-30
申请人： BAE SYSTEMS plc
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）而偏置，使得调制器以正交的方式工作， 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（或减少） 并增加振幅的偏置电压（20）; 以及将所述偏置电压（20）的所找到的值识别为对应于所述光学调制器的正交点的偏置电压。
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