Method for controlling transmission of an electronically steerable antenna system and such electronically steerable antenna system

    公开(公告)号:US10663576B2

    公开(公告)日:2020-05-26

    申请号:US16092382

    申请日:2016-04-20

    Applicant: SAAB AB

    Inventor: Lars Sundell

    Abstract: A method is provided for controlling transmission of an electronically steerable antenna system, wherein the electronically steerable antenna system comprises a signal generator configured to generate electromagnetic waveforms, and an antenna. The electronically steerable antenna system is configured for transmitting at least interrogation signals and ISLS control signals, and the method comprises the steps of, when transmitting the ISLS control signals: generating an electromagnetic waveform; applying a first transmission phase offset to the electromagnetic waveform, wherein the first transmission phase offset determines the phase offset between each antenna column pair; applying a second transmission phase offset to each antenna column of the second antenna half, wherein the second transmission phase offset of the second antenna half offset is 180 degrees in relation to the first antenna half; and transmitting the generated electromagnetic waveform whereto the first and the second phase offsets have been applied.

    Detecting objects in images
    152.
    发明授权

    公开(公告)号:US10571560B2

    公开(公告)日:2020-02-25

    申请号:US15761955

    申请日:2015-09-21

    Applicant: SAAB AB

    Inventor: Hans Hellsten

    Abstract: A method and a device for detecting at least one target in an image, wherein the image comprises a set of pixels with a magnitude assigned to each pixel is provided. The method comprises an iterative process until the K+1th target does not show a probability increase above a predetermined threshold value. The method is performed by creating a candidate free image, calculating, for the candidate free image, the probability of there being a target at each pixel, by using Bayes theorem, determining a location of the candidate target K+1 in the image, determining the probability that there is a target at the determined location, by determining the calculated probability of there being a target at the determined location. By performing the above, the most probable locations for targets in the image are located together with the probability that the location holds a true target.

    COUNTER MASS CONTAINER FOR A WEAPON
    153.
    发明申请

    公开(公告)号:US20200025534A1

    公开(公告)日:2020-01-23

    申请号:US16469196

    申请日:2017-12-05

    Applicant: SAAB AB

    Inventor: Ulf BENGTSSON

    Abstract: The present invention relates to a counter mass container (2) enclosing a plurality of parallel axially extending channels (1). The invention also relates to an assembly of a plurality of such counter mass containers (2). The invention also relates to a weapon comprising a barrel (5) accommodating such an assembly.

    REBALANCING OF UNDERWATER VEHICLES
    154.
    发明申请

    公开(公告)号:US20200017180A1

    公开(公告)日:2020-01-16

    申请号:US16471988

    申请日:2016-12-23

    Applicant: SAAB AB

    Abstract: A rebalancing device for rebalancing of an underwater vehicle comprises at least one thruster and at least one storage space. The rebalancing device comprises control circuitry. The control circuitry is configured to receive sensor data comprising information relating to a depth and an attitude of the underwater vehicle, and thruster data comprising information relating to thrust and orientation of thrust of the at least one thruster. The control circuitry is further configured to determine a difference between a centre of gravity, CoG, of the underwater vehicle and a centre of buoyancy, CoB, of the underwater vehicle based on the sensor data and the thruster data, and to determine a difference between a gravitational force acting on the underwater vehicle and a buoyancy of the underwater vehicle based on the sensor data and the thruster data.

    A FLUID ACTUATOR ARRANGEMENT
    155.
    发明申请

    公开(公告)号:US20190293093A1

    公开(公告)日:2019-09-26

    申请号:US16071327

    申请日:2016-11-17

    Applicant: SAAB AB

    Inventor: Magnus LANDBERG

    Abstract: A fluid actuator arrangement comprises a first cylinder housing including a first head member and a second head member; a first piston body is slidable arranged in said first cylinder housing; the first piston body divides the first cylinder housing interior into a first cylinder chamber and a second cylinder chamber, at least the first cylinder chamber is coupled to a fluid supply. The first piston body exhibits a first through-bore and a second through-bore that extend through the first piston body in an axial direction; a first piston rod is arranged slidable in the first through-bore and a second piston rod is arranged slidable in the second through-bore; and the first through-bore comprises a first engagement and disengagement device and the second through-bore comprises a second engagement and disengagement device, which are arranged for providing individual engagement or disengagement to or from the respective first and second piston rod.

    COUNTERMEASURE DISPENSER WITH VARIABLE SPOILER AND METHOD FOR LAUNCHING A COUNTERMEASURE

    公开(公告)号:US20190283879A1

    公开(公告)日:2019-09-19

    申请号:US16301604

    申请日:2017-05-05

    Applicant: SAAB AB

    Abstract: A dispenser for storing and launching countermeasures from an aircraft, comprising an elongate body provided with at least one launch opening adapted for storing the countermeasures in cartridges, where the dispenser comprises a manoeuvrable spoiler arranged in front of the launch opening, where the spoiler is adapted to be fully retracted before a countermeasure has been launched, and that the spoiler is adapted to extend outwards in a predefined manner when a countermeasure has been launched. The advantage of the invention is that a spoiler will reduce induced noise from the open cartridges by extending a spoiler outwards depending on the number of launched countermeasures. This allows for a simple, reliable and cost-effective solution.

    T-SHAPED BROADBAND BANDPASS FILTER
    157.
    发明申请

    公开(公告)号:US20190237837A1

    公开(公告)日:2019-08-01

    申请号:US16336801

    申请日:2016-09-26

    Applicant: SAAB AB

    Inventor: Hans-Olof VICKES

    CPC classification number: H01P1/20 G01R29/08 H01P1/20363

    Abstract: The filter unit has a center frequency and comprises a first dielectric substrate, a first conducting plane, and at least one transmission arrangement. The at least one transmission arrangement comprises a shunt node which has a shunt connection to the conducting plane. The electrical length of the shunt connection defines the center frequency of the filter unit. The transmission arrangement further comprises a plurality of transmission lines connected in series between an input port and an output port, wherein each port is connectable to auxiliary systems with a system impedance. Moreover, each transmission line has a characteristic impedance and wherein the characteristic impedance of each transmission line is less than the system impedance.

    MAGAZINE, CARTRIDGE AND METHOD FOR LAUNCHING A COUNTERMEASURE

    公开(公告)号:US20190137220A1

    公开(公告)日:2019-05-09

    申请号:US16301186

    申请日:2017-05-05

    Applicant: SAAB AB

    Abstract: A magazine for storing and launching countermeasures arranged in cartridges, comprising a plurality of longitudinal cartridge cases forming the magazine, where the magazine comprises a tilting means adapted to tilt the cartridge cases, such that the openings of the cartridge cases can be directed in a selected direction, and where the magazine comprises a tracking system comprising an active position sensor adapted to detect the position of an incoming object. The advantage of the invention is that a countermeasure can be directed towards an incoming object before it is launched.

    Fluid actuator arrangement
    160.
    发明授权

    公开(公告)号:US09995320B2

    公开(公告)日:2018-06-12

    申请号:US15524513

    申请日:2015-11-16

    Applicant: SAAB AB

    Inventor: Magnus Landberg

    Abstract: The present invention regards an elongated fluid actuator arrangement comprising a first and second cylinder housing (3, 5) extending in a longitudinal direction (X), respective housing (3, 5) encompasses a first respective a second piston body (7, 9). The respective piston body (7, 9) divides the respective cylinder housing (3, 5) in a first and second cylinder chamber (11, 13). The arrangement (1) is adapted for connection to a valve member means (15) of a fluid supply device (17). A piston rod member (19) extending through said respective first and second piston bodies (7, 9). The first piston device (7) comprises a piston rod engagement and disengagement means (29), which is adapted to engage or disengage the first piston device (7) to/from the piston rod member (19), wherein an engagement area (A2), defined by an engagement zone between the first piston body (7) and the piston rod member (19), is larger than a cross-sectional piston area (A1) of the first piston body (7).

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