Application: Loop antenna. A transmitter uses a Hertzian dipole, 0.02A long. Because of changes in design, it becomes necessary to replace the Hertzian dipole by an equivalent loop antenna, keeping the current in the loop the same as the current in the dipole.
(a) What is the radius of the loop that will produce the same fields in the far field?
(b) What is the orientation of the loop with respect to the Hertzian dipole?