公开(公告)号：EP1949132A2

公开(公告)日：2008-07-30

申请号：EP06808462.3

申请日：2006-11-08

申请人： QinetiQ Limited

发明人： SALMON, Neil, Anthony ,  HAYWARD, Stephen, David ,  KAUSHAL, Tej, Paul ,  MILLINGTON, David, Alan

IPC分类号： G01S13/89 ,  G01V8/00

摘要： A passive detection device is disclosed comprising a plurality of antennas, receivers, and a digital beamformer, wherein the antennas and receivers are adapted to receive radiation of millimeter wavelengths from a near field region, to process and digitize it. The beamformer is adapted to process the received information and to generate static image information relating to the region. An indication means is provided to indicate the presence of objects of interest. The beamformer is preferentially adapted to generate information simultaneously in a plurality of planes at different distances from the apparatus. The indication means may comprise an array of pixels along the length of the apparatus to display image information, and may use the multi-planar information to construct images of the region comprising data from a plurality of planes. The invention has utility in security scanning applications such as at airports or other locations where security detection equipment is employed.

公开(公告)号：EP1794615A1

公开(公告)日：2007-06-13

申请号：EP05784372.4

申请日：2005-09-21

申请人： QinetiQ Limited

发明人： BEASLEY, Patrick David Lawrence, QinetiQ Limited

IPC分类号： G01S7/40 ,  G01S13/34

CPC分类号： G01S7/4056 ,  G01S13/343

摘要： A frequency modulated continuous wave (FMCW) radar is described that comprises a frequency sweep generator (42) for producing a swept frequency signal. A discriminator (52) receives a portion of the swept frequency signal and produces a reference difference-frequency signal. The discriminator 52 comprises an optical delay means, which may comprises a laser diode (72), an optical fibre (74) and a detector (76) for producing a time displaced frequency swept signal from which the difference-frequency signal is derived. A transceiver (50) is also described that generates the signal to be transmitted by the radar from the swept frequency signal and produces a target difference-frequency signal. An analogue-to-digital converter (80) samples the target difference-frequency signal at a rate derived from the frequency of the reference difference-frequency signal. Use of the radar in various applications, such as detecting foreign object debris on airport runways and perimeter security, are also described.

公开(公告)号：EP1712931A1

公开(公告)日：2006-10-18

申请号：EP05252320.6

申请日：2005-04-14

申请人： Qinetiq Limited

发明人： Lycett, Samantha Jane, c/o QinetiQ Limited

IPC分类号： G01S13/91

CPC分类号： G01S13/91 ,  G01S2013/916

摘要： A method of detecting a target in a scene is described that comprises the step of taking one or more data sets, each data set comprising a plurality of normalised data elements, each normalised data element corresponding to the return from a part of the scene normalised to a reference return for the same part of the scene. The method then involves thresholding (16) at least one of the normalised data elements of each of said one or more data sets. The thresholding step (16) comprises comparing each of the normalised data elements to at least first and second thresholds, wherein the first threshold is greater than the second threshold. The use of one or more confirmation scans (18) in combination with the thresholding step is also described. A radar system is also described that uses the method to detect foreign object debris (FOD) on a surface such as an airport runway.

摘要翻译： 描述了一种用于检测场景中的目标的方法，其包括采取一个或多个数据集的步骤，每个数据集包括多个归一化数据元素，每个归一化数据元素对应于来自场景的一部分的返回归一化为 对于场景的相同部分的参考返回。 该方法然后涉及将所述一个或多个数据集中的每一个的归一化数据元素中的至少一个阈值化（16）。 阈值步骤（16）包括将每个归一化数据元素与至少第一和第二阈值进行比较，其中第一阈值大于第二阈值。 还描述了与阈值步骤组合使用一个或多个确认扫描（18）。 还描述了一种雷达系统，其使用该方法来检测诸如机场跑道的表面上的异物碎片（FOD）。

公开(公告)号：EP1680815A2

公开(公告)日：2006-07-19

申请号：EP04798422.4

申请日：2004-11-05

申请人： Qinetiq Limited

发明人： ASHLEY, Timothy QinetiQ Limited ,  BRUSON, Kevin, M. QinetiQ Limited ,  BUCKLE, Philip, D. QinetiQ Limited ,  COX, Timothy, I. QinetiQ Limited ,  GEDDES, Norman, J. QinetiQ Limited ,  JEFFERSON, John, H. QinetiQ Limited ,  NOBLE, Russell, A. QinetiQ Limited ,  SAGE, Ian, C. QinetiQ Limited ,  COMBES, David, Johnathon QinetiQ Limited

IPC分类号： H01L29/00

CPC分类号： H01L51/0508 ,  B01L3/502707 ,  B01L3/502738 ,  B01L3/502761 ,  B01L2300/0636 ,  B01L2300/0681 ,  B01L2400/0633 ,  B82Y10/00 ,  G01N27/414 ,  H01L51/0035 ,  H01L51/0052 ,  H01L51/0595 ,  Y10S977/807

摘要： A molecular single electron transistor (MSET) detector device (14) is described that comprises at least one organic molecule (87) connecting a drain electrode (84) and a source electrode (82). In use, said at least one organic molecule (87) provides a quantum confinement region. At least one analyte receptor site,(90, 92) is provided in the vicinity of said at least one organic molecule (87) that bind molecules of interest (analytes). A fluid analyser (2) is also described that includes the MSET detector, a pre-concentrator (4) and a fluid gating structure (6). The fluid gating structure (6) is arranged to selectively route fluid from the pre-concentrator (4) to either one of the detector (14) and an exhaust port (12). The pre-concentrator (4), fluid gating structure (6) and detector (14) are each formed as substantially planar layers and arranged in a stack or cube.

公开(公告)号：EP1606667A1

公开(公告)日：2005-12-21

申请号：EP04721562.9

申请日：2004-03-18

申请人： Qinetiq Limited

发明人： SALMON, Neil Anthony,QinetiQ Limited

IPC分类号： G02B26/08 ,  G01S3/789

CPC分类号： G02B5/3058 ,  G01S3/789 ,  G01V8/005 ,  G02B26/0891 ,  G02B27/28

摘要： A millimetre wave imaging apparatus (200) comprises a scanning mechanism (202), a reflector lens (210) and a receiver array (212). The scanning mechanism (202) comprises two wedge prisms (204, 205) which scan radiation incident upon them across the receiver array (212) in an elliptical pattern. This optical configuration is such that the pupil plane, defined by the scanning mechanism (202), is located optically at the centre of curvature of the focusing surface (214), which reduces coma and astigmatism optical aberrations.

公开(公告)号：EP1552578A2

公开(公告)日：2005-07-13

申请号：EP03753790.9

申请日：2003-10-15

申请人： Quintel Technology Limited

发明人： HASKELL, Philip Edward ,  HICKLING, Paul Anthony

IPC分类号： H01Q1/24 ,  H01Q3/26 ,  H04Q7/30

CPC分类号： H01Q1/246 ,  H01Q3/30 ,  H04B7/10 ,  Y02D70/442

摘要： A mobile-radio base station for a telecommunications system includes vector modulator means for independently controlling the phase and/or amplitude of a plurality of component signals representative of the signal to be transmitted or received, such that when these signals pass through a plurality of antenna elements, a beam is formed in a direction according to the phase relationship of the component signals. The invention also includes interface means allowing other base stations to be coupled to the same antenna, with each base station having independent control of its beam direction. Provision is includes for phase compensation of the signals to correct for errors introduced by unequal and variable component signal path lengths between the base station and the antenna. The vector modulator means is arranged to operate at low power levels, where it can operate more efficiently.

摘要翻译： 用于电信系统的移动无线电基站包括用于独立地控制表示要发送或接收的信号的多个分量信号的相位和/或幅度的矢量调制器装置，使得当这些信号通过多个天线 元件，根据分量信号的相位关系在一个方向上形成一个光束。 本发明还包括允许其他基站耦合到相同天线的接口装置，每个基站具有其波束方向的独立控制。 提供的是用于信号的相位补偿的装置，以校正由基站和天线之间的不等和可变分量信号路径长度引入的误差。 矢量调制器装置被布置成在低功率水平下操作，其中其可以更有效地操作。

公开(公告)号：EP1488411A1

公开(公告)日：2004-12-22

申请号：EP03712399.9

申请日：2003-03-24

申请人： Qinetiq Limited

发明人： WEBBER, Christopher J. St. Clair,QinetiQ Malvern

IPC分类号： G10L15/14

CPC分类号： G10L15/144

摘要： A signal processing system is disclosed which is implemented using Gaussian Mixture Model (GMM) based Hidden Markov Model (HMM), or a GMM alone, parameters of which are constrained during its optimisation procedure. Also disclosed is a constraint system applied to input vectors representing the input signal to the system. The invention is particularly, but not exclusively, related to speech recognition systems. The invention reduces the tendency, common in prior art systems, to get caught in local minima associated with highly anisotropic Gaussian components - which reduces the recogniser performance - by employing the constraint system as above whereby the anisotropy of such components may be minimised. The invention also covers a method of processing a signal, and a speech recogniser trained according to the method.

公开(公告)号：EP1485969A1

公开(公告)日：2004-12-15

申请号：EP03712320.5

申请日：2003-03-07

申请人： QINETIQ LIMITED

发明人： FLETCHER, Paul,c/o QinetiQ Limited ,  DEAN, Michael,c/o QinetiQ Limited

IPC分类号： H01Q3/26 ,  H04B7/08

CPC分类号： H04B7/0848 ,  H01Q3/2605 ,  H04B7/0822

摘要： A phased array antenna that employs a switched least means squared architecture comprises plurality of receiving elements (502a-n) each having a respective weighting unit (504a-n) associated therewith, a summation unit (510), a processor (5 15), a plurality of sampling devices (516a-n) and a switching unit (527). The switching unit (527) contains a switch arm (529) having a contact at its free and, an ADC (533) and a plurality of switch contacts (535a-n) corresponding to the ends of channels (525a-n) connected to the respective sampling devices (516a-n). Each of a plurality of receiving elements (502a-n) is ampled by a respective sampling device (516a-n) prior to an incoming signal subjected to complex weighting by respective weighting units (504a-n). Each of the signals sampled by the sampling device (516a-n) passes along respective channels (525a-n) to the switching unit (527). Thus, by switching between the contacts (535a-n) it is possible to vary which of the receiving elements is sampled. The processor (515) calculates new complex weighting coefficients to be applied to the incoming signals by the weighting units (504a-n) using the sampled incoming signals in order to minimise a difference between an output from the summation unit y (n) and a training signal d (n).

公开(公告)号：EP1443347A2

公开(公告)日：2004-08-04

申请号：EP04009506.9

申请日：1998-06-17

申请人： QuinetiQ Limited

发明人： Birks, Timothy Adam ,  Knight, Jonathan Cave ,  Russell, Philip St. John

IPC分类号： G02B6/16 ,  H01S3/067 ,  H04B10/00

CPC分类号： C03B37/01205 ,  B82Y20/00 ,  C03B2201/34 ,  C03B2203/14 ,  C03B2203/42 ,  G02B6/02 ,  G02B6/02333 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/02371 ,  G02B6/02385 ,  G02B6/1225 ,  G02B6/4296 ,  H01S3/06708

摘要： A large core photonic crystal fibre for transmitting radiation having a core comprising a substantially transparent core material and having a core diameter of at least 5 µm. The fibre also comprises a cladding region surrounding the length of core material, wherein the cladding region comprises a first substantially transparent cladding material, having a first refractive index, and wherein the first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, wherein the holes are filled with a second cladding material having a second refractive index less than the first refractive index, such that radiation input to the optical fibre is transmitted along the length of the core material in a single mode of propagation. In a preferred embodiment, the core diameter may be at least 20 µm, and may be as large as 50 µm. The fibre is capable of transmitting higher power radiation than conventional fibres, whilst maintaining propagation in a single mode.
The core material may doped with a material capable of providing amplification under the action of pump radiation input to the fibre. The invention also relates to a fibre amplifier and a fibre laser comprising a doped large core photonic crystal fibre. The fibre may also be used in a system for transmitting radiation comprising a plurality of lengths of large core photonic crystal fibre, separated by large core photonic crystal fibre amplifiers, such that the power of radiation transmitted through the system is maintained above a predetermined threshold power.

摘要翻译： 一种用于传输辐射的大芯光子晶体光纤，其具有包括基本上透明的芯材料和芯直径至少为5μm的芯。 该光纤还包括围绕芯材料长度的包层区域，其中包层区域包括具有第一折射率的第一基本上透明的包层材料，并且其中第一基本上透明的包层材料沿其长度嵌入基本上周期性的 其中孔填充有具有小于第一折射率的第二折射率的第二包层材料，使得输入到光纤的辐射沿着芯材料的长度以单一传播模式传输。 在一个优选实施例中，芯部直径可以至少为20μm，并且可以大至50μm。 该光纤能够传输比传统光纤更高的功率辐射，同时保持单模传播。 核心材料可以掺入能够在泵浦辐射输入到光纤的作用下提供放大的材料。 本发明还涉及包括掺杂大芯光子晶体光纤的光纤放大器和光纤激光器。 光纤还可以用于传输辐射的系统，该系统包括由大芯核光子晶体光纤放大器分开的多个长度的大芯光子晶体光纤，使得通过系统传输的辐射的功率保持在预定阈值功率以上 。

公开(公告)号：EP2329226B1

公开(公告)日：2018-03-07

申请号：EP09784972.3

申请日：2009-08-20

申请人： QinetiQ Limited

发明人： CRICKMORE, Roger, Ian

IPC分类号： G01D5/353

CPC分类号： G01D5/35303 ,  G01V1/16

摘要： Interrogation of a phase based transducer is performed by temporally overlapping and interfering a single pulse output from the transducer to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement therefore has reduced sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively.