Microwaves (above 1 GHZ = 1 billion cycles per second)

High frequency radio waves lying roughly between infrared waves and radio waves. Microwaves are generated by electron tubes, such as the klystron and the magnetron, or solid state devices with built-in resonators to control the frequency or by oscillators. Microwaves have many applications for radio, television, radar, test and measurement communications, distance and location measuring, and more.