An "unintentional radiator" is a term used in the field of electromagnetic compatibility (EMC) to refer to a device or equipment that emits radiofrequency energy as a byproduct of its operation, even though its primary function is not to intentionally radiate or communicate using radio waves. These radiated emissions are often considered undesirable, as they can interfere with the proper functioning of other electronic devices or communication systems in close proximity.
Unintentional radiators can include a wide range of electronic equipment such as computers, televisions, fluorescent lamps, electronic household appliances, and power supplies. These devices generate electromagnetic fields during their normal operation due to the electrical signals running through their circuits. These fields can then unintentionally couple with other electronic components or systems, leading to electromagnetic interference (EMI) issues, such as signal degradation or complete disruption.
To mitigate the potential interference caused by unintentional radiators, regulatory bodies, such as the Federal Communications Commission (FCC) in the United States, have established specific emission limits and standards that these devices must meet. To comply with these regulations, manufacturers often employ strategies such as shielding, filtering, or adjusting circuit designs to minimize the radiated emissions.
Overall, the concept of unintentional radiators serves as an important consideration in the design, engineering, and operational aspects of electronic devices, ensuring that they operate harmoniously within an increasingly dense electromagnetic environment.
