Millimeter wave radiation

1. What is millimeter wave radiation?
2. Can millimeter waves penetrate skin?
3. Is mmWave radar safe?
4. What is millimeter wavelength?

What is millimeter wave radiation?

Millimeter waves are electromagnetic (radio) waves typically defined to lie within the frequency range of 30–300 GHz. The microwave band is just below the millimeter-wave band and is typically defined to cover the 3–30-GHz range.

Can millimeter waves penetrate skin?

Millimeter waves penetrate into the human skin deep enough (delta = 0.65 mm at 42 GHz) to affect most skin structures located in the epidermis and dermis.

Is mmWave radar safe?

Unlike much higher frequency ultraviolet, X-ray, and gamma radiation, mmWave radiation is non-ionizing. Thus, the main safety concern is heating of the eyes and skin caused by the absorption of mmWave energy in the human body. Fortunately, our bodies are reflective and do not absorb much mmWave radiation^{1 2}.

What is millimeter wavelength?

Millimeter wave (MM wave), also known as millimeter band, is the band of spectrum with wavelengths between 10 millimeters (30 GHz) and 1 millimeter (300 GHz). It is also known as the extremely high frequency (EHF) band by the International Telecommunication Union (ITU).