BasicB-001-024-003
According to Safety Code 6, what frequencies cause us the greatest risk from RF energy?
A
Answer
Regulations and administration
Type
A
48 MHz to 300 MHz
B
300 MHz to 3000 MHz
C
Above 1500 MHz
D
3 MHz to 30 MHz
Answer Notes
According to Safety Code 6, the frequency range that poses the greatest risk to humans is 48 MHz to 300 MHz. This specific VHF/UHF range is where the most stringent exposure limits are enforced.
The reason for this heightened risk is that the physical dimensions of an average human body act like a resonant antenna at these frequencies, maximizing energy absorption. Frequencies much higher (like microwaves) or lower (like HF) do not couple as efficiently with the human body, so they are considered slightly less hazardous at equivalent power levels.
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What is the purpose of Safety Code 6?
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Why is the limit of exposure to RF the lowest in the frequency range of 48 MHz to 300 MHz, according to Safety Code 6?