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    Phased array antenna
    41.
    发明授权
    Phased array antenna 有权

    公开(公告)号：US09905923B2

    公开(公告)日：2018-02-27

    申请号：US14416228

    申请日：2013-07-17

    Applicant: THE SECRETARY OF STATE FOR DEFENCE

    Inventor： Neil Andrew Redit

    IPC: G08B13/14 ,  H01Q3/34 ,  H01Q21/06 ,  H01Q17/00

    CPC classification number: H01Q3/34 ,  H01Q17/00 ,  H01Q21/06

    Abstract: There is provided a phased array antenna comprising a plurality of antenna elements (12) and switching circuitry configured to switch the phased array antenna to an inactive mode. The switching to the inactive mode comprises the switching circuitry connecting random or pseudo-random impedance elements (20) to the antenna elements to reduce the peak backscatter level of the phased antenna array.

    ANIMAL TRAINING SYSTEM AND METHOD
    43.
    发明申请
    ANIMAL TRAINING SYSTEM AND METHOD 有权
    动物培训系统与方法

    公开(公告)号：US20150245592A1

    公开(公告)日：2015-09-03

    申请号：US14429056

    申请日：2013-09-26

    Applicant: THE SECRETARY OF STATE FOR DEFENCE

    Inventor： Nicola Jane Sibbald ,  Stephen Nicklin

    IPC: A01K15/02 ,  A01K29/00

    CPC classification number: A01K15/02 ,  A01K15/027 ,  A01K29/00 ,  Y10S119/905

    Abstract: There is provided an animal training system to train an animal to detect a training odour. The animal training system comprises a target (310) comprising the training odour (320) and a hidden marker (330); and a detector (350) for identifying the hidden marker. There is further provided an animal training method using the animal training system, the animal training method for practice by a supervisor, an animal handler, and an animal. The animal training method comprises placing the target (310) in a location of a search area (300), the target comprising the training odour (320) and the hidden marker (330), the placing being carried out by the supervisor; introducing the animal handler and the animal (305) to the search area; scanning with the detector (350) a candid ate location for the hidden marker, the candidate location being a location that is indicated by the animal; and rewarding the animal if the detector indicates the presence of the hidden marker at the candidate location.

    Abstract translation: 提供了一种动物训练系统来训练动物以检测训练气味。 动物训练系统包括包括训练气味（320）和隐藏标记（330）的目标（310）; 以及用于识别隐藏的标记的检测器（350）。 还提供了使用动物训练系统的动物训练方法，由主管，动物处理者和动物进行的动物训练方法。 动物训练方法包括将目标（310）放置在搜索区域（300）的位置，目标包括训练气味（320）和隐藏标记（330），该场所由主管执行; 将动物处理者和动物（305）引入搜索区域; 用检测器（350）扫描隐藏标记的坦诚位置，候选位置是由动物指示的位置; 并且如果检测器指示在候选位置处存在隐藏标记，则给予动物。

    Single mode optical fibre
    46.
    发明申请
    Single mode optical fibre 有权
    单模光纤

    公开(公告)号：US20020122644A1

    公开(公告)日：2002-09-05

    申请号：US09984891

    申请日：2001-10-31

    Applicant: The Secretary of State for Defence

    Inventor： Timothy A. Birks ,  Jonathan C. Knight ,  Philip St. J. Russell

    IPC: G02B006/00 ,  G02B006/02 ,  G02B006/20

    CPC classification number: 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

    Abstract: 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 5null. 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 A 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 20null, and may be as large as 50null. The fibre is capable of transmitting higher power radiation than conventional fibres, whilst maintaining propagation in a single mode. The core material may be 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.

    Abstract translation: 一种用于传输辐射的大型核心光子晶体光纤，其具有包括基本上透明的芯材并具有至少5mu的芯直径的芯。 光纤还包括围绕芯材长度的包层区域，其中包层区域包括具有第一折射率的第一基本上透明的覆层材料，并且其中第一基本上透明的覆层材料沿其长度嵌入基本上周期性的A阵列 的孔，其中所述孔填充有具有小于第一折射率的第二折射率的第二覆层材料，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。 在优选实施例中，芯直径可以至少为20mu，并且可以大至50mu。 光纤能够传输比常规光纤更高的功率辐射，同时保持在单一模式下的传播。 芯材料可以掺杂有能够在泵浦辐射输入到纤维的作用下提供放大的材料。 本发明还涉及一种光纤放大器和包括掺杂大芯光子晶体光纤的光纤激光器。 该光纤还可用于传输辐射的系统，该系统包括由大型核心光子晶体光纤放大器分离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功率保持在预定阈值功率以上 。

    Method and apparatus for locating the source of an unknown signal
    48.
    发明申请
    Method and apparatus for locating the source of an unknown signal 有权
    用于定位未知信号源的方法和装置

    公开(公告)号：US20020070889A1

    公开(公告)日：2002-06-13

    申请号：US09955224

    申请日：2001-09-19

    Applicant: The Secretary of State for Defence

    Inventor： Christopher Griffin ,  Paul R. Edmonds ,  Simon R. Duck

    IPC: H04B007/185

    CPC classification number: G01S5/02 ,  G01S1/026 ,  G01S1/045 ,  G01S5/0009 ,  G01S5/06

    Abstract: A method of determining the location of an unknown source 10 transmitting a signal to satellite relays 14 and 16 comprises receiving replicas of the signal from the relays at receivers 18. The receivers 18 also transmit and receive reference signals via respective relays 14 and 16. All signals are downconverted, digitized and correlated with one another in pairs using a correlation function including a term which compensates for time varying differential frequency offset (DFO). Compensation for time varying differential time offset or time dilation is achieved by replicating or adding to signal samples and applying phase corrections. This procedure enables a correlation maximum and associated measurement results to be obtained despite the effects of relay satellite motion which mitigate against this. Results are used in a prior art geometrical technique to locate the unknown transmitter.

    Abstract translation: 确定向卫星中继器14和16发送信号的未知源10的位置的方法包括在接收器18处接收来自中继器的信号的副本。接收器18还经由相应的继电器14和16发送和接收参考信号。全部 信号被下变频，数字化并且使用包括补偿时变差频偏移（DFO）的项的相关函数成对地相互关联。 通过复制或添加信号样本并进行相位校正来实现时变差分时间偏移或时间扩展的补偿。 该过程使得能够获得相关最大值和相关联的测量结果，尽管中继卫星运动的影响减轻了这一点。 结果用于现有技术的几何技术以定位未知发射机。

    Barrier cream comprising hexamethylenetetramine or derivative thereof
    49.
    发明申请
    Barrier cream comprising hexamethylenetetramine or derivative thereof 失效
    包含六亚甲基四胺或其衍生物的阻隔霜

    公开(公告)号：US20010046995A1

    公开(公告)日：2001-11-29

    申请号：US09767136

    申请日：2001-01-23

    Applicant: The Secretary of State for Defence, Great Britain and Northern Ireland

    Inventor： John Jenner ,  Colin N. Smith ,  Robert P. Chilcott ,  Christopher D. Lindsay

    IPC: A61K031/53

    CPC classification number: A61Q17/00 ,  A61K8/4966 ,  A61K8/70 ,  Y10S514/946 ,  Y10S514/947

    Abstract: Skin protection agents such as topical compositions which can prevent the passage of toxic chemicals through the skin, such as barrier creams. Formulations may contain hexamethylene tetramine or derivatives or analogues thereof, which react with alkylating agents such as sulfur mustard, and which are suitable for formulation into topical compositions. The formulations additionally may contain perfluorinated polymeric compounds which are effective barrier compounds for a range of toxic chemicals.

    Abstract translation: 皮肤保护剂，例如可防止有毒化学物质通过皮肤的局部组合物，例如防护霜。 制剂可以含有六亚甲基四胺或其衍生物或类似物，其与烷基化剂例如硫芥反应，并且适合于配制成局部组合物。 制剂另外可以含有全氟化聚合物，它们是一系列有毒化学物质的有效屏障化合物。

    Projectile launch apparatus for use in fluid environments
    50.
    发明授权
    Projectile launch apparatus for use in fluid environments 有权

    公开(公告)号：US12281875B2

    公开(公告)日：2025-04-22

    申请号：US18252739

    申请日：2021-11-11

    Applicant: The Secretary of State for Defence

    Inventor： Peter Richard Rushforth ,  David Timothy Newell

    IPC: F41F3/10 ,  F42B10/38 ,  F42B14/02 ,  F42B17/00 ,  F42B19/12

    Abstract: Projectile launch apparatus (20) for use in a fluid environment. The apparatus (20) comprises a launch tube (21) having a supercavitating projectile (24) with cavitator (29) received within the launch tube (21). A means for generating expulsion gas (not visible) is arranged to provide expulsion gas to propel the projectile (24) from the launch tube (21), with means for bleeding expulsion gas (31, 32) being provided to bleed a portion of expulsion gas around the projectile (24). This allows expulsion gases to contribute to the formation of the gas cavity around the supercavitating projectile (24) as the projectile (24) is launched from the launch tube (21). Particularly suited to the deployment of supercavitating projectiles underwater, such as in underwater mine disposal applications.

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