MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) SYSTEM AND METHODS

    公开(公告)号:WO2022251330A1

    公开(公告)日:2022-12-01

    申请号:PCT/US2022/030881

    申请日:2022-05-25

    Abstract: The present disclosure relates generally to a network system having multiple users, multiple inputs, and multiple outputs to transmit data from a data source through a link to a data sink. One example of a Multi-user multiple input multiple output (MU-MIMO) system relates to the use of primary transceivers and secondary transceivers in respective networks that effectuate data transmission. The primary transceivers are coupled with a data source and broadcast or transmit the data source signal to a plurality of secondary transceivers in a local area network. The signal is then transmitted over a long link to another set of secondary transceivers that then pass the signal to another primary transceiver. This another primary transceiver is coupled with the data sink to effectuate signal transmission to the data sink. The data is synchronized in manner that requires minimal processing and does not require closed loop phase control.

    ROTATABLE ANTENNA DESIGN FOR UNDERSEA VEHICLES

    公开(公告)号:WO2022232021A1

    公开(公告)日:2022-11-03

    申请号:PCT/US2022/026138

    申请日:2022-04-25

    Abstract: An antenna module configured for use on an underwater vehicle is disclosed. The antenna module includes an array of spiral antennas fabricated on a multi-layer substrate that provides wide-band RF communication with direction finding (DF) capability. The antenna module can also include other antennas fabricated on the same multi-layer substrate, such as one or more global positioning system (GPS) receivers, an ultra-high frequency/very-high frequency (UHV/VHF) antenna, or one or more iridium antennas. The antenna module may further include a water-proof housing that is coupled to the outside hull of an undersea vehicle via a coupling mechanism. The coupling mechanism allows the antenna module to rotate between a stowed position against the hull and a deployed position that extends the antennas out away from the undersea vehicle. The antenna module is curved or flexible so it can stow against a corresponding curved hull of the undersea vehicle.

    PRE-LAUNCH ENERGY HARVESTING ON AERODYNAMIC SYSTEMS

    公开(公告)号:WO2022226281A1

    公开(公告)日:2022-10-27

    申请号:PCT/US2022/025905

    申请日:2022-04-22

    Abstract: An energy harvesting system is disclosed that is especially well-suited for use on aerodynamic systems such as guided projectiles or other aerobodies. A series of piezoelectric cantilevers are arranged to capture vibrations from the ambient environment and transduce the mechanical motion from the vibrations into useful electrical energy. The piezoelectric cantilevers can be arranged along different planes from one another to capture different vibrational modes and directions. A power conditioning circuit is included to receive the electrical energy produced by the piezoelectric cantilevers. A storage element coupled to the power conditioning circuit is configured to store charge based on the electrical energy produced by the plurality of piezoelectric cantilever structures. The stored charge can be used to provide low levels of power to certain electrical components on board the aerodynamic system before it has been launched.

    CONTROL PLATE-BASED CONTROL ACTUATION SYSTEM

    公开(公告)号:WO2022125348A2

    公开(公告)日:2022-06-16

    申请号:PCT/US2021/061332

    申请日:2021-12-01

    Abstract: The system and method of a steering a moving object using a control plate-based control actuation system on the moving object. The control plate-based control actuation system having a control plate with at least four fin linkages for connecting at least four fins to the control plate; and three actuators configured to move the control plate to produce movement in two or more of the at least four fins. The system produces roll, pitch, and yaw moments for the moving object using three actuators acting on the control plate and thus moving two or more of the at least four fins all with no loss of performance as compared to systems with four actuators.

    REFRACTIVE LASER COMMUNICATION BEAM DIRECTOR WITH DISPERSION COMPENSATION

    公开(公告)号:WO2022109111A1

    公开(公告)日:2022-05-27

    申请号:PCT/US2021/059853

    申请日:2021-11-18

    Abstract: A co-boresight refractive beam director for a full duplex laser communication terminal includes a chromatic beam steering element, such as a two or three prism Risley prism assembly, and a dispersion compensation mechanism (DCM) inserted in either the transmit or receive path. The DCM adjusts a beam direction of either the transmit or receive laser beam to compensate for a pointing difference introduced by the beam steering element due to a difference between the transmit and receive wavelengths. The DCM can include a tip/tilt mirror and actuator, which can be a commercially available FSM assembly. The beam steering element can be temperature stabilized. Position feedback sensors can increase DCM speed and accuracy. The pointing difference can be calculated and/or interpolated from a pre-established look-up table or fitted curve relating pointing differences to transmit and receive frequencies and the pointing direction of the beam steering element.

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