A turnstile antenna consists of two crossed dipole antennas. in this case, located in the x-y plane - the dipoles are also identical and lie on the x and y axes respectively and are both fed at the origin assume the equal currents are supplied to each antenna and that a zero phase reference is applied to the x direction antenna.
Determine relative phase of the y directed antenna so that the net radiated electric field as measured on the positive z axis makes an angle between x and y.