Microwave heating energy-feedback antenna and manufacturing method thereof

Abstract

The invention discloses a microwave heating energy-feedback antenna and a manufacturing method thereof. The microwave heating energy-feedback antenna for connecting with a waveguide comprises a waveguide flange that is in connection with a port of the waveguide, and a resonance chamber integral in shape of a flat, wherein a layer of sealing mediums is filled into the resonance chamber body; a hole array for radiating microwave out of the resonance chamber is arranged on the wall of the resonance chamber, wherein the waveguide flange is placed on one corner of the resonance chamber; and a motivation angle between the waveguide and the resonance chamber is of 45 degrees. By the microwave heating energy-feedback antenna, the microwave can be transmitted at 45 degrees from the side to the flat shaped resonance chamber by the waveguide flange through the waveguide, and a TMmno mode standing wave is formed by the microwave in the layer of sealing mediums of the resonance chamber, and radiated from the hole array, as a result, the power output efficiency and the coupling efficiency of the microwave can be raised; the heating uniformity can be improved; and discharging can be restrained.

Description

technical field [0001] The invention relates to the technical field of industrial microwave heating, in particular to a microwave heating feed antenna and a manufacturing method thereof. Background technique [0002] In the field of microwave energy application technology, two main frequency bands recommended by the International Microwave Energy Institute (IMPI), namely 915MHz and 2450MHz frequency bands, are widely used. [0003] The freeze-drying technology has been widely used in the food, pharmaceutical and biological product industries due to its advantages of preserving heat-sensitive components and biological activity of materials. However, freeze-drying using traditional heat sources has the disadvantages of low drying rate, long time, large energy consumption and high cost. Microwave heating belongs to dielectric heating. Microwave vacuum freeze-drying technology is the product of the combination of microwave technology and vacuum freeze-drying technology. It uses...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-power energy-feeding method for the existing microwave heating energy-feeding antenna resonant cavity coupling method with high electric field strength in the coupling hole area, easy ignition and discharge, and local overheating of materials. Microwave heating feeding antenna that can not only ensure the uniformity of heating, but also improve microwave coupling efficiency and prevent discharge

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