High frequency radio waves used for telecommunications transmission. Line-of-sight, point-to-point transmission of signals at high frequency, usually above 890 MHz. Many cable television systems receive some television signals from a distant antenna location with the antenna and the system connected by microwave relay. Microwave frequencies require direct line-of-sight to operate. Trees and buildings distort or block the signal.
Microwaves are a form of energy similar to television and radio waves. Instead of transforming electrical waves into pictures and sound, they are transformed into heat to cook food.
That part of the electromagnetic spectrum at which the wavelength falls between about 30 centimeters and 1 millimeter. Microwave frequencies range from 1 GHz to 300 GHz. Microwaves are very short electromagnetic radio waves but have a long wavelength than infrared energy