Comment on "Radial dependence of radiation from a bounded source" by Kirk T. McDonald
A. Ardavan, H. Ardavan, J. Singleton
Abstract
The purpose of this note is to point out that McDonald's criticism of our work r1 is based on a circular argument. In order to show that the field of a bounded source falls off as f(θ,ϕ)/r in the far zone, McDonald uses a Huygens-Kirchhoff diffraction integral whose derivation (from Maxwell's equations) already entails assuming a fall-off of this form for the field at infinity r2. (r, θ and ϕ are the spherical polar coordinates centred on a point within the source, and f is a factor independent of r.
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