Microwave heat treating furnace

摘要

A microwave furnace having a tunnel-like structure within which are arranged paired coherent sources of electromagnetic radiation that develop electromagnetic fields that have an interference pattern in which the average density of electromagnetic waves in each cross section of the furance is substantially constant. The paired coherent sources are box horns with each pair connected to a corresponding microwave generator that applies its microwave energy directly to one of the box horns of the pair and applies it through a phase shifter to the other box horn of the pair. The phase shifter shifts the relative phase shift cylically and effects for all points of each cross section an average valve of electromagnetic energy density that is constant over a cycle of variation of each phase shift. The box horns are arranged aligned on opposite sides of the longitudinal axis of the tunnel-like furnace with the radiation openings thereof aligned and extending in the longitudinal direction of the furnace.