Patent ID: 7863547

Claim:
Apparatus for exposing materials to microwave energy, the apparatus comprising: a cylindrical wall extending axially from a first end to a second end and including an interior surface and an exterior surface and defining an axis, the cylindrical wall forming a first elongated slot elongated generally axially along the cylindrical wall and extending through the cylindrical wall from the interior surface to the exterior surface; an end plate closing off the second end of the cylindrical wall to form a cylindrical chamber; a first waveguide having a waveguide wall extending in length along a direction of propagation of microwave energy and forming an elongated opening in the waveguide wall along the length of the waveguide; wherein the first waveguide connects to the exterior surface of the cylindrical chamber with the elongated opening in the waveguide wall in communication with the first elongated slot through which the first waveguide couples microwave energy into the cylindrical chamber.