An intentional radiator is any device that is deliberately designed to produce

radio waves Radio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz ( GHz) and below. At 300 GHz, the corresponding wavelength is 1 mm (s ...

. Radio transmitters of all kinds, including the garage door opener, cordless telephone,

cellular phone A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link whi ...

, wireless video sender, wireless microphone, and many others fall into this category. In the United States, intentional radiators are regulated under 47 CFR Part 15, Subpart C.

See also