Radiofrequency (RF) refers to electromagnetic waves in the frequency range of approximately 3 kHz to 300 GHz. This portion of the electromagnetic spectrum is used for wireless communication.
RF energy powers technologies like cell phones, WiFi routers, Bluetooth devices, radio broadcasts, and television signals.
Radiofrequency describes the portion of the electromagnetic spectrum used for wireless communications—everything from AM radio to 5G cellular networks. These waves oscillate at frequencies between roughly 3 kilohertz and 300 gigahertz.
Put simply, RF is the invisible energy that allows your devices to communicate without wires. When you make a phone call, stream music over WiFi, or use Bluetooth headphones, you’re using radiofrequency technology.
The key point is that RF radiation is non-ionizing, meaning it doesn’t have enough energy to break chemical bonds or damage DNA directly the way X-rays can. However, RF energy can cause heating effects in biological tissue when exposure is high enough—which is why safety standards exist.
Common sources of RF in your home include cell phones, WiFi routers, cordless phones, smart meters, baby monitors, and microwave ovens. The strength of RF exposure depends on three factors: the power of the source, your distance from it, and how long you’re exposed.
What this means in practical terms: RF exposure follows the inverse square law, so doubling your distance from a source reduces exposure by 75%. This is why simple changes—like keeping your phone away from your body or positioning your WiFi router in a less-trafficked area—can meaningfully reduce your daily RF exposure.
For those concerned about RF levels, a power density meter can measure the intensity of radiofrequency fields in your environment.
