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For pulse radar with a maximum unambiguous range of 60 km, what is the maximum allowable pulse repetition frequency?

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ISRO VSSC Technical Assistant Electronics 2018 Official Paper
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  1. 5 × 105 pps
  2. 2 × 104 pps
  3. 4 × 105 pps
  4. 2.5 × 103 pps

Answer (Detailed Solution Below)

Option 4 : 2.5 × 103 pps
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Detailed Solution

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Concept:

The maximum unambiguous range of pulse radar is given as:

Where,

c = speed of light

PRT = pulse repetition time

PRF = pulse repetition frequency

Calculation:

Given:

Range = 60 km

PRF = 2.5 × 103 pps

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