Main ideas:
Radiation with frequency between 300 MHz and 300 GHz in electromagnetic spectrum, which located between infra-red and radio frequency, named microwave radiation. In most heating microwave appliances frequency 2450 MHz is used. Domestic microwave oven also uses this frequency.
History:
In 1921 American physicist A. Hall introduced term "magnetron".
At the end of 1930 Leningrad physicists headed by Roganskiy D.A. and Kobzarev U.B. developed impulse radio-location principles, and build first radio-location station for enemy aviation disclosure.
Second World War - scientists from Birmingham University created singly resonant microwave generator.
In 1945 American engineer P.Spenser found out the thermal action of microwaves.
Patent for microwave oven creation belongs to him.
In 1949 production of large dimension microwave oven begins.
In 1962 Japanese company "Sharp" started mass production of common microwave ovens.
