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  • The power radiated from a linear antenna of length  is proportional to (Given, <img alt="\lambda=" src="https://entrance

The power radiated from a linear antenna of length l  is proportional to (Given, \lambda= Wavelength of wave):

Option: 1

\frac{l}{\lambda}


Option: 2

\frac{l^{2}}{\lambda}


Option: 3

\frac{l}{\lambda^{2}}


Option: 4

\left(\frac{l}{\lambda}\right)^{2}


Answers (1)

best_answer

Effective power radiated by an antenna:

The power radiated is proportional to \left ( \frac{l }{\lambda} \right )^{2}. It shows that for the
same antenna length, the power radiated increases with decreasing \lambda i.e., increasing frequency. Hence, the effective power radiated by a long-wavelength baseband signal would be small. For a good transmission, we need high powers and hence this also points out the need of using high-frequency transmission.

Posted by

shivangi.bhatnagar

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