The physical sizes of the transmitter and receiver antenna in a communication system are :-
Show Hint
- proportional to carrier frequency
- inversely proportional to carrier frequency
- inversely proportional to modulation frequency
- independent of both carrier and modulation frequency
The Correct Option is B
Solution and Explanation
The wave radiated in a communication system is at the carrier frequency: \(\lambda=\dfrac{c}{f_c}\).
\(\ell\approx\dfrac{c}{4f_c}\propto\dfrac{1}{f_c}\).
So the physical size is inversely proportional to the carrier frequency.
Answer: (2) inversely proportional to carrier frequency
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