How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent?

RF exposure limits are evaluated based on the average exposure over a specific period of time. The duty cycle represents the percentage of time your station is actively transmitting during that evaluation period. If you decrease your duty cycle from 100 percent (transmitting constantly) to 50 percent (transmitting half the time), your average RF exposure is effectively cut in half. Because the average exposure is halved, you can safely double your peak power output while still remaining at the exact same average exposure limit. Therefore, the allowable power density during the actual transmission increases by a factor of 2.