Radiation from ring sources of electric or magnetic dipoles with different orientations in free space

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Abstract
Radiation from a horizontal ring of radial electric dipoles, the strength of which varies as exp (jnφ), is calculated for an unbounded medium by the saddle-point method of approximation. The cylindrical components of the radiated fields due to ring sources composed of radial, angular and vertical electric or magnetic dipoles, the amplitude of which varies as cos nφ (or sin nφ), are presented in a tabular form.