Subelement A: RADAR Principles – 10 Key Topics – 10 Exam Questions – 8 Drawings— Topic 4: Power, Pulse Width, PRR
Question 8-4A5
Element 8 (RADAR)What is the average power if the RADAR set has a PRF of 1000 Hz, a pulse width of 1 microsecond, and a peak power rating of 100 kilowatts?
Explanation
In a pulsed radar system, the average power is the peak power multiplied by the duty cycle. The duty cycle represents the fraction of time the transmitter is actually emitting power.
1. **Calculate the duty cycle:**
Duty Cycle = Pulse Width × PRF
Duty Cycle = (1 microsecond) × (1000 Hz)
Duty Cycle = (1 × 10⁻⁶ seconds) × (1000 pulses/second)
Duty Cycle = 0.001
2. **Calculate the average power:**
Average Power = Peak Power × Duty Cycle
Average Power = (100 kilowatts) × (0.001)
Average Power = (100,000 watts) × (0.001)
Average Power = 100 watts
Therefore, the average power is 100 watts. Options A and C are incorrect as they result from miscalculations of the duty cycle or the final product.
Related Questions
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