Patent ID: 7189939

Claim:
A microwave plasma discharge unit detachably connectable with a supply unit which comprises a microwave coaxial cable for transmitting microwaves, said microwave coaxial cable including a core conductor and a ground conductor, said ground conductor being provided around said core conductor by way of a dielectric layer, the portable microwave plasma discharge unit comprising: a conducting gas flow tube adapted to direct a flow of gas therethrough and said gas flow tube having an inlet portion and an outlet portion; and a rod-shaped conductor axially disposed in said gas flow tube, said rod-shaped conductor having a front end and a rear end, the front end being positioned adjacent the outlet portion of said gas flow tube, the rear end of said rod-shaped conductor being configured to contact said core conductor, and the rod-shaped conductor being coaxially provided with the core conductor; and a grounded cable holder comprising a conducting material, provided around the rear end of said rod-shaped conductor, said grounded cable holder being connected with said gas flow tube and said ground conductor so that said gas flow tube is grounded via the ground conductor.