Abstract: A device and method for separating soot or other impurities from the exhaust gases of an internal-combustion engine, particularly a diesel internal-combustion engine, comprises a microwave source that is coupled to the intermediate section of the exhaust pipe that is constructed for the development of an electromagnetic field, an effective burning of the soot with a low flow resistance, the intermediate section being developed as a cavity resonator and at its exhaust gas inlet and exhaust gas outlet, is equipped with a metal grid, and an insert made of a dielectric material in the cavity resonator concentrates the exhaust gas flow in the area of high energy density of the electromagnetic field.

Abstract: A device for fusing and fixing a toner image on a carrier in an electromagnetic radiation field, utilizing a microwave power transmitter connected to a microwave generator. The transmitter has a plurality of discrete transmitting elements coupled in parallel to the microwave generator and arranged in rows transverse to the direction of carrier travel. The elements are spaced apart within the rows and the rows are offset from one to the next such that uniform energy density for fusing and fixing of the toner image is radiated across the web width of the carrier.