Patent ID: 7271363

Claim:
A supply unit for use with a portable unit including: a gas flow tube made of a conducting material and adapted to direct a gas flow therethrough and having an outlet portion and an inlet portion; a rod-shaped conductor disposed in said gas flow tube and having a rear end and front end, said front end positioned adjacent said outlet portion, and configured to focus microwaves traveling through said rod-shaped conductor, said rod-shaped conductor extending along an axis of said gas flow tube; a connector disposed around the rear end of said rod-shaped conductor and connected with said gas flow tube, said connector being made of a conducting material; said supply unit comprising: a microwave coaxial cable for transmitting microwaves, said microwave coaxial cable including: a core conductor and a ground conductor around said core conductor by way of a dielectric layer, a leading end of said microwave coaxial cable being engageable with said connector in a state that a leading end of said core conductor is connected with the rear end of said rod-shaped conductor, that is provided in said gas flow tube, in such a manner that said rod-shaped conductor is co-axially provided with said core conductor, and a leading end of said ground conductor is connected with said connector so that said gas flow tube is grounded via the connector to said ground conductor; at least one gas line for transmitting a flow of gas, said gas line being connectable with said gas flow tube; and an attachment member for positioning said at least one gas line at a predetermined position relative to said microwave coaxial cable.