Portion of the electromagnetic spectrum that is situated between radio wave s and infrared radiation .
Microwaves have wavelengths ranging from 30 cm to 1 mm, corresponding to frequencies from about 1 gigahertz (10 9 Hz) to 1 terahertz (10 12 Hz). They are the principal carriers of television, telephone, and data transmissions between stations on Earth and between the Earth and satellites. maser .