Balanis - Antenna 3rd Edition - Problem 2.4

a) HPBW = 2.09 rad

b) HPBW = 1.57 rad

c) HPBW = 1.047 rad

d) HPBW = 0.785 rad

e) HPBW = 0.698 rad

f) HPBW = 0.523 rad