In the plane x = 0 there are two linear antennas with an infinitesimally small cross-section, which are parallel to the z-axis and are at a distance a from each other. Both antennas have the current distribution, 7 I (2) I1 (0, 0, z)= 12 (0, a, z)= Iosin( 2+ 2a X N. H (F) = a jk e-jkr 4 T 1 1. Calculate the magnetic field strength in the far-field on the positive y-axis. Hint: y [I (P)exp (jk EP (K-7) a dr 2. How can the distance between the two antennas be selected so that the magnetic far-field di- sappears on the positive y-axis? For this same distance, how would the field look like on the negative y-axis?