Raytheon Company

Arthur S Dwyer

Raymond S Kasevich

Myer Kolker

Bart G Guerreri

A microwave dipole probe for in vivo localized hyperthermia includes an outer conductor and an inner conductor extending through and beyond the outer conductor. The portion of the inner conductor extending beyond the outer conductor is expanded in diameter relative to the portion within the outer conductor. A dielectrically loaded phase reversal sleeve is folded over the outside of the outer conductor and contains a dielectric loading material similar to the dielectric constant of the in vivo target volume.

Microwave dipole probe for in vivo localized hyperthermia

The process and apparatus for extracting the products of kerogen in situ from an oil shale body by supplying energy selectively to the kerogen by high frequency electric fields in the frequency range between 100 kilohertz and 1000 megahertz at an intensity which heats the kerogen to a temperature range between 250.degree. C. and 500.degree. C. to allow pyrolysis of the kerogen prior to substantial heat transfer to the surrounding mineral portions of the oil shale. A plurality of groups of spaced radiators produce the electric fields for heating the kerogen. A dipole radiator in the subsurface formation is supplied with electromagnetic energy through a transmission line from an energy generator on the surface.

In situ radio frequency selective heating system

The process and apparatus for extracting the products of kerogen in situ from an oil shale body by supplying energy selectively to the kerogen by high frequency electric fields in the frequency range between 100 kilohertz and 1000 megahertz at an intensity which heats the kerogen to a temperature range between 250.degree. C. and 500.degree. C. to allow pyrolysis of the kerogen prior to substantial heat transfer to the surrounding mineral portions of the oil shale.

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Braintree, MA, United States of America

Arthur S Dwyer