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    Method and apparatus for characterizing homodyne transmitters and receivers
    1.
    发明授权
    Method and apparatus for characterizing homodyne transmitters and receivers 有权

    公开(公告)号：US11268997B1

    公开(公告)日：2022-03-08

    申请号：US16996561

    申请日：2020-08-18

    Applicant: Keysight Technologies, Inc.

    Inventor： Jan Verspecht ,  Augustine Stav

    IPC: G01L21/32 ,  G01R23/20 ,  H04L27/38 ,  G01R27/28 ,  G01R35/00 ,  H01J41/04 ,  H01J41/06 ,  H01J41/16 ,  H01J41/14 ,  G01L21/00 ,  G01L21/34 ,  G01L19/08

    Abstract: A system of measuring and correcting for distortions in homodyne systems and a method for operating a data processing system to provide an estimate of distortions in homodyne systems are disclosed. The method for operating a data processing system to provide an estimate of a distortion introduced by a homodyne system when the homodyne system processes a time a multi-tone time domain input signal, x(t), to obtain a time domain output signal, y(t) includes receiving a frequency spectrum, X(f), of the multi-tone time domain input signal, x(t) and measuring an output frequency spectrum, Y(f), when the homodyne system operates on x(t). A plurality of parameters of a model that represents a linear frequency response of the homodyne system when operating on X(f) to arrive at Y(f) by fitting the model to Y(f) and X(f) is determined, and the model is applied to X(f) and Y(f) to estimate the distortions.

    Vacuum apparatus
    2.
    发明授权
    Vacuum apparatus 有权

    公开(公告)号：US10804084B2

    公开(公告)日：2020-10-13

    申请号：US15760498

    申请日：2015-09-16

    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION

    Inventor： Souichi Katagiri ,  Keigo Kasuya

    IPC: H01J41/16 ,  H01J41/20 ,  F04B37/02 ,  H01J37/073 ,  H01J37/28

    Abstract: In a vacuum apparatus including an ultrahigh vacuum evacuation pump, the ultrahigh vacuum evacuation pump is provided with a rod-shaped cathode including a non-evaporable getter alloy, a cylindrical anode disposed so as to surround the cathode, and a coil or a ring-shaped permanent magnet disposed so as to sandwich upper and lower openings of the cylindrical anode and surround the rod-shaped cathode. As a result, it is possible to reduce the size and weight of the ultrahigh vacuum evacuation pump and to dispose the vacuum evacuation pump at a desired location in the vacuum apparatus.

    Method for activating a gas phase stabilizer installed within a gas-filled proportional counter
    3.
    发明授权
    Method for activating a gas phase stabilizer installed within a gas-filled proportional counter 失效
    用于激活安装在充气比例计数器内的气相稳定器的方法

    公开(公告)号：US4778346A

    公开(公告)日：1988-10-18

    申请号：US648751

    申请日：1984-09-07

    Applicant: Marja-Leena Jarvinen ,  Heikki J. Sipila

    Inventor： Marja-Leena Jarvinen ,  Heikki J. Sipila

    IPC: G01T1/18 ,  H01J41/16 ,  H01J47/06 ,  F04B37/02

    CPC classification number: H01J47/06

    Abstract: The invention relates to a method for heating a gas phase stabilizer (5) installed within a gas-filled proportional counter (1) in order to activate the stabilizer (5). According to the invention, the heat is conducted into the proportional counter (1) along a thermal inlet (3), which is in thermal exchange contact with the stabilizer (5). The thermal inlet (3) employed in forming the gas filling can advantageously be employed for heating the stabilizer up to the activating temperature.

    Abstract translation: 本发明涉及一种用于加热安装在充气比例计数器（1）内以便激活稳定器（5）的气相稳定器（5）的方法。 根据本发明，热量沿着与稳定器（5）热交换接触的热入口（3）传导到比例计数器（1）中。 用于形成气体填充物的热入口（3）可以有利地用于将稳定剂加热至活化温度。

    High vacuum gettering pump
    4.
    发明授权
    High vacuum gettering pump 失效
    高真空泵

    公开(公告)号：US3666377A

    公开(公告)日：1972-05-30

    申请号：US3666377D

    申请日：1969-06-02

    Applicant: VARIAN ASSOCIATES

    Inventor： ROBERTSON DAVID D ,  WHEELER WILLIAM R

    IPC: H01J7/18 ,  H01J41/16 ,  F04B37/02

    CPC classification number: H01J7/18 ,  H01J41/16

    Abstract: A HIGH VACUUM GETTERING PUMP IS DESCRIBED WHICH IS CAPABLE OF PROVIDING A HIGH VAPORIZATION RATE OF A GETTER MATERIAL. THE PUMP INCLUDES A HIGH THERMIONIC EMISSION CATHODE FILAMENT DISPOSED OVER A SURFACE OF A BULK SUPPLY OF A GETTER MATERAL SUCH AS TITANIUM. THE GETTER MATERIAL IS CONTAINED WITHIN A CUP-SHAPED HEAT SHIELD AND HAS A PERIPHERAL CONFIGURATION MINIMIZING THE AMOUNT OF MATERIAL AT THE SIDES OF THE BODY OF GETTER MATERIAL WHICH WILL NOT BE MELTED BY THERMIONIC EMISSION FROM THE FILAMENT WHEN A HIGH OPERATING POTENTIAL IS APPLIED BETWEEN THE FILAMENT AND THE GETTER MATERIAL BODY. A SHIELD IS ALSO

    PROVIDED BLOCKING LINE-OF-SIGHT TRAVEL OF VAPORIZED GETTER MATERIAL TO A PORTION OF THE FILAMENT WHICH DOES NOT REACH A HIGH ENOUGH TEMPERATURE TO PREVENT CONDENSATION OF THE GETTER MATERIAL. THE SHEILD IS TAPERED INWARDLY AND CURVED AWAY FROM THE FILAMENT ADJACENT AN UNSHIELDED PORTION THEREOF TO MINIMIZE THE EFFECT CAUSED ON THE OPERATION OF THE FILAMENT BY THE BUILD-UP OF GETTER MATERIAL ON THE SHIELD.

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