Question

The power radiated by linear antenna of length $l$ is proportional to ($\lambda =$ wavelength) :

• A. $\frac{\lambda }{l}$
• B. ${\left(\frac{\lambda }{l}\right)}^2$
• C. $\frac{l}{\lambda }$
• D. ${\left(\frac{l}{\lambda }\right)}^2$

Answer 1

Answer: (D)

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

A linear antenna radiates power proportional to $(\frac{l}{\lambda }{)}^2$.

Hence a longer antenna emits more power. Also power radiated by a long wavelength base would be small.