Plain-language answer: There is no universal safe distance from a transmitting antenna; required separation depends on frequency, power, duty cycle, antenna gain and pattern, installation, and the applicable exposure limit.
Why it matters
Near-field behavior and directional lobes make simple power-only tables unreliable outside their assumptions. Public and occupational exposure categories may also differ.
Use it correctly
Evaluate the worst credible configuration under current rules, mark or control the required area, and recalculate after any power, antenna, band, or location change.
The common mistake
Copying a distance from another station with a different antenna and operating pattern.
Decision boundary
Current regulation, program rules, manufacturer limits, exact station configuration, and live observations control. Recheck changing rules, solar conditions, and operating status before acting.
