If the minimum range is to be doubled in a radar, the peak power has to be increased by a factor of

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URSC ISRO Technical Assistant Electronics 24 March 2019 Official Paper
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  1. 4
  2. 8
  3. 16
  4. 32

Answer (Detailed Solution Below)

Option 3 : 16
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The range of the radar is given as:

G= Antenna Gain

σ = Radar Cross-Section

Pr = Reflected Power

Ae = Effective Area of the Antenna

Observation:

We observe that, R ∝ (Pt)1/4

Now, to double the range R, Pt has to be increased by a factor of 16

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