Traditional Culture Encyclopedia - Traditional stories - Microwave frequency range
Microwave frequency range
According to Baidu Encyclopedia, microwave refers to electromagnetic waves with frequencies between 300 MHz and 300 GHz. It has the characteristics of easy bunching, high directivity and straight-line propagation, and can be used to transmit high-frequency signals in unobstructed line-of-sight space.
The frequency of microwave is higher than that of ordinary radio waves, and it is often called "UHF electromagnetic wave". As an electromagnetic wave, microwave also has wave-particle duality. The basic properties of microwave usually show three characteristics: penetration, reflection and absorption. For glass, plastic and porcelain, microwaves can almost pass through without being absorbed. For water and food, it absorbs microwaves and heats itself. For metal things, it will reflect microwaves. Due to the characteristics of microwave, its propagation loss in air is large and its transmission distance is short, but it has good maneuverability and wide working bandwidth. Except for millimeter wave technology used in 5G mobile communication, microwave transmission is mostly in metal waveguide and dielectric waveguide.
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