Electromagnetic Field Theory - Engineering

Q1:

A broadside array operating at 100 cm wavelength consist of 4 half-wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5 A. The radiated power will be

A 196 W

B 73 W

C 36.5 W

D 18.25 W

ANS:A - 196 W

P = n . I2 . Rr, where Rr = 80p2 Ω. n = 4.