The physical sizes of the transmitter and receiver antenna in a communication system are:

Question:

The physical sizes of the transmitter and receiver antenna in a communication system are:

  1. (1) independent of both carrier and modulation frequency

  2. (2) inversely proportional to carrier frequency

  3. (3) inversely proportional to modulation frequency

  4. (4) proportional to carrier frequency

Correct Option: , 2

Solution:

(2) Size of antenna,'

$l=\frac{\lambda}{4} .$ As $\lambda=\frac{C}{f} \therefore l \propto \frac{1}{f}$

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