Some Investigations on Dielectric Aerials

Abstract

A comparative study of the expressions for radiation pattern of a circular dielectric rod aerial excited in the HE₁₁ mode as obtained¹ by the Schelkunoff's equivalence principle and by the application of Huyghen's principle over the whole rod² shows that in the Φ = 0° and Φ = 90° planes, the beamwidth of the major lobe and the structure of the radiation pattern differ in the former case but are the same in the latter case. It is also shown that Halliday and Kiely's theory,³ also based on Huyghen's ray theory, does not indicate any variation in these factors in the two planes. This is justified due to the vector nature of the Schelkunoff's principle and the scalar nature of the original Huyghen's principle.