Microwave technology was first used in communication, broadcasting and television technology. In these fields, microwave is used as an information or information carrier. In the application of microwave communication engineering for decades, it is found that there is always a harmful factor-thermal effect, which will cause microwave energy loss and needs to be prevented and eliminated. As early as 1945, some people in the United States put forward the idea of using this thermal effect of microwave to heat materials. Subsequently, many people explored, experimented and studied this topic-microwave heating. Until the late sixties.

Microwave energy is finally used as energy for heating, drying, insect killing, sterilization, medical treatment and other industrial projects. The initiative is in the food industry, and the emergence of household microwave ovens has further expanded the application field of microwave heating technology. Now, microwave heating, as a new technology, has been highly valued and applied in various disciplines.

Foreign countries have always attached great importance to the applied research and academic exchanges of microwave energy. 1966, the International Microwave Power Research Institute (IMPI) was established in Alberta, Canada, North America, and held an academic seminar every year, and published the quarterly Microwave Power regularly.

China began to study the application of microwave energy in the 1970s, and 1973 began to study the application technology of microwave heating and the development of magnetron for microwave heating. 1974 and 1980, the Ministry of Electronic Industry held the "National Conference on Popularization and Application of Microwave Energy" to exchange academic and applied technical issues of microwave. In March of August1year, with the approval of the Fourth Machinery Department, the scientific and technological strength of subordinate units was transferred, and the microwave energy popularization and application station of China Electronic Device Industry Corporation was established, which was responsible for the organization, design and research of microwave energy popularization and application in China. 1983 10 10 In October, the Chinese Institute of Electronics held the first "National Symposium on Microwave Energy Application". After that, every two years, the microwave application technology exchange meeting will be held in turn in the areas with better popularization and application in the country to promote the development of domestic microwave industry. Collected works are published in each session, involving industrial, agricultural, medical, scientific research and other application fields.

At present, China has gradually adopted microwave technology in leather, wood, color printing, food, paper making, chemical industry, ceramics, medicine, tobacco leaves, building materials, rubber, medical care and other industries, and achieved good economic benefits. As a new processing method, microwave energy technology has a great influence on the technical transformation and equipment renewal of various industries. Especially at this stage, operators are faced with solving the problems of product structure and social demand and adapting to the improvement of product quality and variety requirements of social development. One of its focuses is the lack of technological innovation and the lag of quality upgrading. The appearance of microwave technology provides good conditions for improving product grade, keeping up with technological progress and creating high value-added products.