Question

Radiation resistance of a Hertzian dipole of length λ/8 is ________

(a) 12.33Ω

(b) 8.54Ω

(c) 10.56Ω

(d) 13.22Ω

I got this question by my school teacher while I was bunking the class.

My doubt stems from Basics topic in section Antenna Parameters of Antennas

Answer 1

The correct choice is (a) 12.33Ω

The explanation is: Radiation resistance of a Hertzian dipole of length l is

R=80π^2\((\frac{l}{\lambda})^2=80\pi^2 (\frac{\lambda/8}{\lambda})^2=12.33\Omega\)