Abstract: An antenna assembly includes a balanced antenna feed configured to receive a differential signal and a ground plane. The assembly further includes a first conductive dipole arm in planar alignment with a surface of the ground plane and a second conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the first conductive dipole arm. The assembly further includes a first feedline in electrical communication with the first conductive dipole arm and the balanced antenna feed and a second feedline in electrical communication with the second conductive dipole arm and the balanced antenna feed. The assembly further includes a conductive wall (“H-wall”) in electrical communication with the ground plane and having an end adjacent to, and physically separate from, the second conductive dipole arm. The H-wall has an axial length orthogonal to the ground plane.

Abstract: A method of training a machine learning, ML, algorithm, is described. The method is implemented, at least in part, by a computer comprising a processor and a memory. The method comprises: providing training data comprising a set of audio signals, including a first audio signal, as respective bitstreams, corresponding with respective sets of watercraft (S501); training the ML algorithm using the provided training data comprising detecting the respective sets of watercraft and classifying the detected respective sets of watercraft according to a set of classes, including a first class, based, at least in part, on a set of labels, including a first label, wherein the set of labels relates to propeller, propulsor, prime mover and/or submerged equipment associated with watercraft (S502).

Abstract: A chaff dispensing system that is provided on an aircraft and includes a container, a dispensing assembly, a controller, and a volume of chaff material. The container has a first end, a second end, and a chamber that extends between the first and second ends, and the second end defines an ejection port. The dispensing assembly is operably engaged to the container. The controller is electrically connected to the dispensing assembly. The volume of chaff material is disposed inside the chamber of the container. The volume of chaff material is dispensed by the dispensing assembly operably through the controller in metered volumes of chaff material. In addition, a first volume of chaff material may be metered at a first time and a second volume chaff material may be metered at a second time in which the second volume of chaff material is different than the first volume of chaff material.

Abstract: An antenna assembly includes an antenna feed, a ground plane, a first antenna element, a second antenna element, and a shorting post that is shared between the first and second antenna elements. The first antenna element includes a first conductive dipole arm in planar alignment with a surface of the ground plane and a second conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the first conductive dipole arm. The second antenna element includes a third conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the second conductive dipole arm, and a fourth conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the third conductive dipole arm. The shorting post is in electrical communication with the ground plane, the second conductive dipole arm and the third conductive dipole arm.

Abstract: A device includes a frame and at least one printed circuit board attached to the frame. The frame includes an integrated aperture antenna array and an antenna feed in electrical communication with the at least one printed circuit board. The integrated aperture antenna array further includes a first conductive dipole arm in planar alignment with a surface of the frame; a second conductive dipole arm in planar alignment with the surface of the frame and adjacent to the first conductive dipole arm; a first feedline in electrical communication with the first conductive dipole arm and the antenna feed; a second feedline in electrical communication with the second conductive dipole arm and the surface of the frame; and a shorting arm in electrical communication with second conductive dipole arm and the frame.

Abstract: A power supply includes an I/O module configured to receive a high voltage DC input and output a high voltage DC, a plurality of DC converter modules configured to receive the high voltage DC output from the I/O module and output a low voltage DC output, and a plurality of AC inverter modules configured to receive the high voltage DC output from the I/O module and output a high voltage AC output. Each of the plurality of DC converter modules, each of the plurality of AC inverter modules and the I/O module may be mounted in a corresponding individual chassis. Each of the individual chassis may be configured to be stackable together into a single line replaceable unit (LRU). Each of the individual chassis may have an identically shaped outer frame.

Abstract: The invention relates to a tracked vehicle (10; 11) comprising a vehicle body (30, 32; 30), at least one track assembly (21) and a suspension device (S) for suspension of said track assembly (21) to said vehicle body (30) of said tracked vehicle (10; 11). Said track assembly (21) comprises a track support beam (22), a plurality of road wheels (23, 23a), at least one drive wheel (24), and an endless track (25). Said track support beam (22) is arranged to support said at least one drive wheel (24) and a plurality of road wheels (23, 23a). Said endless track is disposed around said at least one drive wheel (24) and plurality of road wheels (23, 23a). Said suspension device (S) comprises two pendulum arms (52, 54) which in one end are rotatably attached to a respective fastening point (P1b, P2b) in said vehicle body (30; 32, 30) and in the other end are rotatably attached to a respective fastening point (P1a, P2a) in the track support beam (22) of said track assembly (21).

Abstract: A method of training a machine learning, ML, algorithm to control a watercraft is described. The watercraft is a submarine or a submersible submerged in water. The method is implemented, at least in part, by a computer, comprising a processor and a memory, aboard the watercraft. The method comprises: obtaining training data including respective sets of environmental parameters and corresponding actions of a set of communicatively isolated watercraft, including a first watercraft; and training the ML algorithm comprising determining relationships between the respective sets of environmental parameters and the corresponding actions of the watercraft of the set thereof. A method of controlling a watercraft by a trained ML algorithm is also described.

Abstract: A method of manufacturing, at least in part, a composite mould tool is described. At S101, the method comprises obtaining a mould tool precursor having a first face and a reverse second face, wherein the precursor comprises a first metal. At S102, the method comprises hermetically scaling the precursor by cold spraying a layer on the second face using particles comprising a second metal, wherein the respective coefficients of thermal expansion of the first metal and the second metal are within a factor of 5. At S103, the method comprises providing a faceplate of the composite mould tool by subtractive manufacturing of the first face.

Abstract: A power amplifier has multiple stages, wherein one stage includes nonuniform distributed power amplifier circuitry and an electrically subsequent stage includes reactively match power amplifier circuitry. There is a non 50 Ohm intermediate impedance between the distributed and reactively matched stages. The ratio of periphery between the subsequent reactively matched stage and the prior distributed stage being less than or equal to 2:1.

Abstract: There is provided a vehicle for protecting an entity against directed-energy weapons, comprising: a housing; and a shield for absorbing or reflecting a laser beam, the shield, in use, extending in a plane from the housing. There is also provided a system of vehicles and a method of coordinating a plurality of vehicles to protect an entity against directed-energy weapons.

Abstract: A method for producing a warhead with directed blasting action involves the step of making an outer casing and arranging therein a charge with a cavity situated at the front end of the charge. An insert whose shape corresponds to the shape of the cavity is arranged on the surface of the charge. The method furthermore involves the step of depositing a material on the insert in an additive manufacturing process. A warhead manufactured according to the method includes an outer casing, a charge with a cavity situated at the front end of the charge, and an insert. A material is deposited on the insert.

Abstract: Image sensor systems are disclosed that include charge coupled device (CCD) pixels integrated with CMOS readout circuitry via separately bonded substrates. According to some embodiments, columns of image sensing pixels on a first substrate are arranged with overlapping gate structures to facilitate charge transfer between the pixels. At least one pixel is coupled to a first conductive pad that contacts (or is melded with) a second conductive pad from a second substrate bonded to the first substrate. The second substrate includes a readout circuit using one or more CMOS devices coupled to the second conductive pad to receive the accumulated charge from a given column of pixels. The resulting photodetector signal from the accumulated charge can be, for instance, amplified via a source follower component and ultimately read out to a column amplifier, and subjected to further processing and/or use in a given downstream system.

Abstract: There is provided a method for fabricating a waveguide. The method comprising fabricating a first master grating tool comprising a first tool substrate having a surface with an area corresponding at least to the area of a surface of the waveguide and having a first grating profile formed over substantially all of the surface of the first tool substrate. Fabricating a second master grating tool comprising a second tool substrate having a surface with an area corresponding at least to the area of the surface of the waveguide and having a second grating profile formed over substantially all of the surface of the second tool substrate. Using the first master grating tool to replicate the first grating profile over substantially all of a surface of a first waveguide substrate. Using the second master grating tool to replicate the second grating profile over substantially all of a surface of a second waveguide substrate.

Abstract: An airframe or a part thereof 3, for example a skin assembly or a profile such as a structural profile, comprises: a wall W having an aperture A therethrough, wherein the wall W provides a frame F surrounding, at least in part, the aperture A; a panel P conforming with the aperture A; and wherein the airframe or the part 3 thereof is configurable in: a first configuration, wherein the panel P and the frame F are mutually spaced apart; and a second configuration, wherein the panel P is received in the frame F and wherein the frame F resists movement of the panel P in two or three mutually orthogonal directions.

Abstract: A releasable clamp includes: a first jaw and a second jaw, arrangeable to hold an article therebetween; a spacer, arrangeable to space apart the first and second jaws; and a set of retaining members, arrangeable to space together the first and second jaws. The first and second jaws include a first region for contacting the article, a second region defining a portion of a coupling member, a third region for contacting the spacer, and a fourth region for contacting a respective retaining member of the set of retaining members.

Abstract: Disclosed is an underwater charging arrangement comprising a first connector coupled to a daughter craft and a second connector coupled to a mother craft, wherein the first and second connectors are arranged to couple underwater to facilitate the transfer of energy from the mother craft to the daughter craft.

Abstract: A waveguide for use in a head-up or head-worn display, the waveguide comprising: a prism having an entrance pupil for receiving an image; a plurality of gratings configured to direct illumination through the prism towards first and second semi-reflecting surfaces; wherein the semi-reflecting surfaces each reflect a different amount of illumination towards an exit point to produce an output image.

Abstract: A method of producing a pair of simultaneous artificial specklegram images. The method includes steps of: reflecting a target illumination beam off of a target surface via a transmitter optical component of a shearography system; directing a first reference beam from the transmitter optical component to a receiving optical component of the shearography system; directing a second reference beam from the transmitter optical component to the receiving optical component; receiving a reflected beam from the target surface with the receiving optical component; interfering the reflected beam with the first reference beam and the second reference beam; communicating a first data set relating to the pair of simultaneous artificial specklegram images from the receiving optical component to a processor; and processing the first data set to generate the pair of simultaneous artificial specklegram images.

Abstract: A method of image enhancement, the method comprising: obtaining image data representing an image comprising a plurality of pixels, each having a pixel intensity value, the image further comprising a region of interest; analyzing image data associated with the region of interest and gathering relevant statistics thereon; analyzing image data associated with the image as a whole and gathering relevant statistics thereon; accumulating a histogram based on the intensity value of pixels in the image as a whole; defining histogram bins of interest that correspond to a range of pixel intensity values from within the region of interest; attenuating histogram bins outside of the bins of interest OR multiplying bins of interest by a scaling factor; using the attenuated or scaled histogram to create a cumulative distribution function; and using the cumulative distribution function to produce a contrast enhanced image.