Richard Harrison wrote:

I don`t know. But, B.Whitfield Griffith, Jr. has some observations in
"Rado-Eledtronic Transmission Fundamentals" that may be a useful check
on your computations. I expect he checked, rechecked, then checked again
before publication. He put a transmitter on an elemental antenna but it
would work the same in reverse. From page 325:

Yes, it should.

. . .
. . . We need
much more information than this; we must know the relationship between
the current and the actual value of the field it produces. Further
computation from the field equations gives this relalationship; we find
that a current of 1 amp flowing in the antnna element will produce a
field intensity of 0.3253 mv/m at a distance of 1 mile iin the direction
of maximum radiation. . .

The field intensity of the elemental antenna is directly proportional to
the current. Therefore, if the current in the element is 15 amp, the
field intensity will be 15 X 0.3253, or 4.8795, mv/m at 1 mile.
Similarly, the field intensity is directly proportional to the length of
the element; an element which is 2-degrees in length, carrying a current
of 1 amp, will thus produce a maximum field intensity of 0.6506 mv/m at
1 mile.

A short dipole antenna with 1 amp of current at the center has an
average of 0.5 amp of current along the whole length. So it should be
obvious from the above analysis that the field from a dipole is half the
field from the elemental antenna with uniform current which the author
is discussing. Or, instead of just taking the average, you can integrate
I * delta L to get the same result.

Roy Lewallen, W7EL