............................(7.21)
Converting to spherical polar coordinates
............................(7.22)
From (7.22) using (7.8) and (7.9) we obtain
.....................................(7.23a)
............................(7.21)
Converting to spherical polar coordinates
............................(7.22)
From (7.22) using (7.8) and (7.9) we obtain
.....................................(7.23a)
| Fundamentals of Antennas and Radiating systems |
Returning back to our problem of computation of radiated field for the current element I dl, we observe that the current I is assumed to be constant over the length of the dipole and |
can be replaced with 
. Further, dl being very small, 
and hence, we can write