Comet Ag

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Mike Abrecht

Walter Bigler

Mark Joachim Mildner

Jack Gilmore

Roger Tanner

Roland Bieri

Douglas Beuerman

Thomas Fink

Philipp Jäggi

Philipp Jaeggi

A power capacitor () is described for use in an RF power delivery system. The power capacitor comprises at least two RF electrodes () separated by a capacitor dielectric () comprising a solid paraelectric dielectric material whose relative permittivity is controllable by varying a DC bias voltage applied across the dielectric () at DC bias electrodes (). Composite capacitor configurations, an RF power system and a method of controlling the power capacitor are also described.

Variable power capacitor for RF power applications

A vacuum variable capacitor includes a pre-vacuum enclosure for reducing a pressure differential across the bellows. The vacuum force load on the drive system can thereby be reduced, allowing faster movement of the movable electrode, faster capacitance adjustment of the vacuum variable capacitor and longer lifetimes of the device.

Vacuum variable capacitor

A vacuum variable capacitor includes a pre-vacuum enclosure for reducing a pressure differential across the bellows, wherein a drive is disposed outside the enclosures of the vacuum variable capacitor. The vacuum force load on the drive system can thereby be reduced, allowing faster movement of the movable electrode, faster capacitance adjustment of the vacuum variable capacitor and longer lifetimes of the device.

A high-voltage capacitor includes a gas-tight enclosure containing interleaved electrodes. The dielectric of the capacitor is a pressurized gas at a pressure of at least 6 bar, and preferably 10 or 15 bar. In order to withstand this level of internal pressure, the insulating body section of the capacitor may be formed of a high-strength polymeric material.

High-voltage capacitor

A variable vacuum capacitor includes two pairs of electrodes ganged together in series such that no moving parts are required to connect electrically to any static pans. Two sets, or gangs, of movable electrodes are connected mechanically and electrically together such that they move together and such that they require no electrical connection to any other part of the device. The ganged arrangement means that the device can be constructed with a smaller diameter, but without significantly increasing the overall length of the device.

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Thörishaus, Switzerland

Mike Abrecht