Compact electromagnetic plasma ignition device

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United States of America Patent

PATENT NO 9638157
SERIAL NO

14272560

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Abstract

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A quarter wave coaxial cavity resonator for producing corona discharge plasma from is presented. The quarter wave coaxial cavity resonator has a folded cavity made of opposing concentric cavity members that are nested together to form a continuous cavity ending in a aperture. A center conductor with a tip is positioned in the cavity. The folded cavity advantageously permits the coaxial cavity resonator to resonate at a lower operating frequency than an unfolded quarter wave coaxial cavity resonator of the same length. Embodiments of the quarter wave coaxial cavity resonator use narrower apertures to reduce radiative losses, and include center conductors that are reactive load elements, such as helical coils. When a radio frequency (RF) oscillation is produced in the quarter wave coaxial cavity resonator, corona discharge plasma is formed at the tip of the center conductor. The corona discharge plasma can be used to ignite combustible materials in combustion chambers of combustion engines.

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Patent Owner(s)

Patent OwnerAddress
WEST VIRGINIA UNIVERSITYCHESTNUT RIDGE RESEARCH BLDG 886 CHESTNUT RIDGE ROAD P O BOX 6224 MORGANTOWN VA 26506-6216

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pertl, Franz A Morgantown, US 19 206
Smith, James E Bruceton Mills, US 167 3079

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