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    Spacecraft Propulsion Devices and Systems with Microwave Excitation
    1.
    发明申请
    Spacecraft Propulsion Devices and Systems with Microwave Excitation 审中-公开

    公开(公告)号：US20200294772A1

    公开(公告)日：2020-09-17

    申请号：US16773908

    申请日：2020-01-27

    申请人： MOMENTUS INC.

    发明人： Jason Hummelt ,  Joel Sercel ,  Philip Mainwaring ,  James Small ,  Matthew Parman

    IPC分类号： H01J37/32 ,  B64G1/40 ,  F03H1/00

    摘要： A thruster system for use in a spacecraft includes a microwave source, a resonant cavity coupled to the microwave source, wherein the microwave source is configured to generate a standing wave field in the resonant cavity, a nozzle provided at one end of the resonant cavity; and at least one injector configured to inject propellant into the resonant cavity so as to create a rotating circumferential flow. The standing wave field raises a temperature of the injected propellant to provide thrust by way of a hot gas exiting the resonant cavity via the nozzle.

    PIERCED WAVEGUIDE THRUSTER
    2.
    发明申请
    PIERCED WAVEGUIDE THRUSTER 有权

    公开(公告)号：US20210262455A1

    公开(公告)日：2021-08-26

    申请号：US17163049

    申请日：2021-01-29

    申请人： MOMENTUS INC.

    发明人： Jason Hummelt ,  Vladlen Podolsky

    IPC分类号： F03H1/00

    摘要： The disclosed propulsion system of a space vehicle and the methods of operating the propulsion system use a microwave energy source to heat propellant in a propellant chamber that pierces and traverses a waveguide carrying the microwave energy. In some implementations, the microwave energy ionizes and further heats the propellant in the propellant chamber. The partially ionized and heated propellant may exit the propellant chamber via a nozzle to generate thrust.

    Spacecraft Propulsion Devices and Systems with Microwave Excitation
    4.
    发明申请
    Spacecraft Propulsion Devices and Systems with Microwave Excitation 有权

    公开(公告)号：US20210183624A1

    公开(公告)日：2021-06-17

    申请号：US17163537

    申请日：2021-01-31

    申请人： MOMENTUS INC.

    发明人： Jason Hummelt ,  Joel Sercel ,  Philip Mainwaring ,  James Small ,  Matthew Parman

    IPC分类号： H01J37/32 ,  F03H1/00 ,  B64G1/40

    摘要： A multi-mode thruster system for use in a spacecraft includes a microwave source; a cavity coupled to the microwave source and including a first inlet to receive a first fluid and a second inlet to receive a second fluid; and a nozzle provided at one end of the cavity. The thruster operates in a microwave electrothermal thruster (MET) mode to (i) generate a standing wave in the cavity using the microwave source and (ii) raise a temperature of the first fluid to generate a first hot gas that exits the cavity via the nozzle to generate thrust. The thruster operates in a chemical propulsion mode to (i) produce a reduction-oxidation reaction between the first fluid and the second fluid and (ii) generate a second hot gas that exits the cavity via the nozzle to generate thrust.