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The physical sizes of the transmitter and receiver antenna in a communication system are: (1) inversely proportional to modulation frequency (2) proportional to carrier frequency (3) inversely proportional to carrier frequency (4) independent of both carrier and modulation frequency

1. inversely proportional to modulation frequency
2. proportional to carrier frequency
3. inversely proportional to carrier frequency
4. independent of both carrier and modulation frequency

Correct answer: independent of both carrier and modulation frequency

Solution

The physical sizes of the transmitter and receiver antennas are determined by factors such as the wavelength of the signal, which is not directly affected by the modulation frequency or the carrier frequency. Therefore, they are considered independent of both frequencies.

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