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I am reading Kraus' book on Antenna, Chapter 6.

I think Eq. (8) and (9) is his solution for the far field of a small-loop antenna.

However, why does he need A (the area) and r both in the equation (8)?

A= \pi r^2 and can be simplified?

I think Eq. (8) and (9) is his solution for the far field of a small-loop antenna.

However, why does he need A (the area) and r both in the equation (8)?

A= \pi r^2 and can be simplified?