Electronics and Communication Engineering - Exam Questions Papers - Discussion

21. 

In a radar system, the range of R1 is achieved at a frequency f1. Then the range R2 at frequency R2 = 8f1 would be __________ [Neglect effect of 1 on the Beam width.]

[A]. R2 = R1
[B]. R2 = 4R1
[C]. R2 = 2R1
[D]. R2 =

Answer: Option C

Explanation:

The range of the radar is directly proportional to the square root of the frequency.

R ∝

R1

and R2

.


Balaji T said: (Nov 15, 2017)  
Where you found this formulae ?
Range = velocity * Time.
or
Range = velocity/frequency.
How it directly proportional to frequency? can you explain this ?

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