Given an infinitesimal dipole antenna with current as I(z’)= (1/3)I0⃑a⃑⃑⃑z .
a. (1pts) Find it’s magnetic potential A ;
b. (2pts) List the corresponding E ⃑ and H⃑⃑ fields expressions.
c. (3pts) For intermediate field (kr>1), prove that only partial of the power flows in the outward direction (radiation).
d. (2pts) If the antenna operates at 1 GHz, determine the Directivity and the Effective Aperture Aem.
