A SMALL WIDEBAND MICROWAVE HIGH TEMPERATURE HEATING APPARATUS

摘要

A small wideband microwave high temperature heating apparatus comprising a furnace, a microwave source (4), and a microwave transmission device. The furnace comprises a furnace body (1), a furnace cover (2) on the top of the furnace body (1), an inner chamber (1-2) inside the furnace body (1), a thermocouple (3) inside the inner chamber (1-2), and a helical antenna (1-3) around the inner chamber (1-2). The central line of the helical antenna (1-3) is parallel to the axis of the thermocouple (3). The helical antenna extends out of the furnace body (1) and is connected to a microwave transmitting device. The microwave transmitting device is connected to a microwave source (4). The furnace cover (2) has an intake vent (2-1) and an exhaust vent (2-2). An insulating layer (1-1) is between the inner chamber (1-2) and the furnace body (1). A sealing device (12) is situated between the furnace body (1) and the furnace cover (2) and is located on the inside of a microwave shielding device (13). The sealing device (12) is made from a rubber sealing ring, and the microwave shielding device (13) is made from a copper wire mesh microwave shielding ring. Using the helical antenna (1-3) to radiate inside a cylindrical microwave resonant cavity with a wide working bandwidth can maintain microwave power despite the small size thereof.