Question

What should be minimum length of antenna for efficient transmission of signals of wavelength?

• A. $\frac{\lambda }{2}$
• B. $\frac{\lambda }{3}$
• C. $\frac{\lambda }{4}$
• D. $\frac{\lambda }{5}$

Answer 1

The correct option is C $\frac{\lambda }{4}$

For efficient radiation and reception, the height of transmitting and receiving antennas should be comparable to a quarter of wavelength of the frequency used. So for efficient transmission of signals of wavelengths $\lambda$ the minimum length of antenna should be $\lambda /4$.