Question

The power radiated by a linear antenna of length $l$ at wavelength $\lambda$ is

• A. directly proportional to $l$
• B. inversely proportional to $\lambda$
• C. inversely proportional to $l$
• D. directly proportional to ${\lambda }^2$
• E. inversely proportional to ${\lambda }^2$

Answer 1

Answer: (E)

inversely proportional to ${\lambda }^2$

The power radiated by a linear antenna of length $l$ at wavelength $\lambda$ is inversely proportional to ${\lambda }^2$ i.e. $P\propto \frac{l^1}{{\lambda }^2}$.