Title :
Comparison Between Geometrical Theory of Diffraction and Electromagnetic Theory for the Study of the Near Field of a Circular Aperture
Author :
Combes, Paul François
Author_Institution :
O.N.E.R.A.-C.E.R.T., Laboratoire du D.E.R.M.O., B.P. 40-25, 31055 TOULOUSE CEDEX, FRANCE
Abstract :
You will find in the theoretical part (& II) of this paper, the formulas obtained by the geometrical theory of diffraction (G.T.D.) which allow to calculate the electric field in the near zone of a circular aperture. The numerical calculus (& III) made from these formulas, in the case of D/¿ = 27 allowed us to establish transversal sections and radiation patterns to 4 Rr, Rr and Rr/2. Their comparison with reference results established by the electromagnetic theory (E.M.T.) (& IV) authorizes us to draw a conclusion (& V) on the interest of the G.T.D. in the near zone of a circular aperture.
Keywords :
Antenna radiation patterns; Antenna theory; Aperture antennas; Argon; Calculus; Electromagnetic radiation; Physical theory of diffraction; Polarization; TV;
Conference_Titel :
Microwave Conference, 1974. 4th European
Conference_Location :
Montreux, Switzerland
DOI :
10.1109/EUMA.1974.332074
