High power low frequency tuners
    6.
    发明授权

    公开(公告)号:US10290428B1

    公开(公告)日:2019-05-14

    申请号:US15677086

    申请日:2017-08-15

    申请人: Christos Tsironis

    发明人: Christos Tsironis

    摘要: A high power low frequency tuner uses motor controlled rotary capacitors submerged in low loss high epsilon dielectric fluid and lengths of semi-rigid RF cable interconnecting the floating static blocks of the capacitors, the rotating blocks being grounded. And tuner calibration and tuning methods, allowing accurate tuning and perfect Smith chart impedance coverage. The full calibration lasts several hours and is reduced by the “de-embedded” calibration algorithm to minutes. A maximum power embodiment comprises full immersion of capacitors and interconnecting cables in circulated dielectric liquid (mineral oil) for breakdown voltage increase and heat removal.

    GALVANIC ISOLATION COUPLING DEVICE
    7.
    发明申请

    公开(公告)号:US20190043671A1

    公开(公告)日:2019-02-07

    申请号:US16053521

    申请日:2018-08-02

    摘要: A system including first and second electric or electronic circuits galvanically isolated from each other, and a coupling device coupling the first circuit to the second circuit, the coupling device including a variable-capacitance capacitor including first and second electrodes mobile with respect to each other, separated by an insulating region, and third and fourth electrodes electrically insulated from the first and second electrodes, capable of receiving a control signal to vary, by an electrostatic, electromagnetic, or piezoelectric actuation mechanism, the relative position of the first and second electrodes, to vary the capacitance between the first and second electrodes.

    CAPACITIVE LOGIC CELL
    8.
    发明申请

    公开(公告)号:US20190035559A1

    公开(公告)日:2019-01-31

    申请号:US16044126

    申请日:2018-07-24

    摘要: A logic cell including a fixed assembly including a first electrode, a mobile assembly including a second electrode, and third, fourth, and fifth electrodes, wherein: the first, second, third, fourth, and fifth electrodes are insulated from one another; the first and second electrodes define a capacitor variable according to the position of the mobile assembly relative to the fixed assembly; the third electrode is connected to a node of application of a first logic input signal; the fourth electrode is connected to a node of application of a second logic input signal; the fifth electrode is connected to a reference node; and the position of the second electrode relative to the first electrode is a function of a combination of the first and second logic input signals.

    FLAT ADJUSTABLE CAPACITOR FOR MAGNETIC RESONANCE SCANNER

    公开(公告)号:US20190019620A1

    公开(公告)日:2019-01-17

    申请号:US16027685

    申请日:2018-07-05

    摘要: The disclosure relates to a compensation capacitor for an antenna of a magnetic resonance scanner and a corresponding antenna with a compensation capacitor. The compensation capacitor has a first electrode and a second electrode arranged in parallel. An insulation material configured to resist high voltages and a dielectric with low dielectric losses are arranged between the first and the second electrode. The second electrode and/or the dielectric may be moved relative to the first electrode such that a surface area of a projection of the surface of the first electrode along the surface normal of the first electrode to the surface of the second electrode and/or the dielectric is variable.