ON THE ISSUE OF DISCRETE REPRESENTATION OF PARABOLIC ANTENNA RADIATION

Yakimov Aleksandr Nikolaevich, doctor of technical sciences, professor, sub-department of radio and optoelectronic complexes, Saint-Petersburg State University of Aerospace Instrumentation (190000, 67 Bolshaya Morskaya street, Saint-Petersburg, Russia), ftor25@mail.ru

621. 391. 677: 519. 711. 3

The mathematical description of the process of superposition of electromagnetic fields generated fragments of the radiating surface of the parabolic antenna is a complex task, it is therefore proposed that the description of this process in the approximation of the physical theory of diffraction. In this regard, the radiating surface is represented by a set of finite element (FE) discretization, and the electric components of the electromagnetic field generated at the point of observation, are determined by the scattering characteristics of the FE and the outer edges of the FE, forming an edge of the radiating surface with excitation of a plane electromagnetic wave irradiator of the antenna incident at an arbitrary angle. Representation in MATLAB of information about the radiating surface of the antenna and the surface currents therein in a matrix form allows you to use the form of operations in MATLAB with each element of the matrix separately to determine the component of the field. The obtained results allow assert that the proposed mathematical model adequately reflects the process of radiation of a parabolic antenna, can be implemented in MATLAB and is suitable to study the influence of the shape of the radiating surface on the radiation characteristics of the antenna.

antenna, radiation, discrete representation, MATLAB.