UNIVERSAL RADIATION MODEL OF MICROWAVE ANTENNA

Abstract

Background. The directional characteristics of microwave antennas are determined by the functional purpose of the radio engineering systems in which they are used. The specified characteristics of antennas can be provided by the formation in their aperture of both in-phase and variable-phase distributions of excitation sources (currents or fields) having the specifics of a mathematical description. The construction of a universal mathematical model that adequately describes the radiation of antennas with different types of distributions of excitation sources will expand the possibilities of solving the problem of designing microwave antennas with specified directional characteristics. Materials and methods. An approach to solving this problem is proposed, based on the use of a combination of analytical and numerical methods, which allows describing individual sections of distribution of excitation sources with different formulas and controlling their parameters to achieve the specified antenna directional characteristics. The possibility of software implementation of the proposed mathematical model in the MATLAB system using predicate logic is shown. Results and conclusions. The results of a model study of the influence of the parameters of the amplitude-phase distribution of excitation sources in the aperture of a microwave antenna on its radiation pattern are presented, confirming the adequacy of the proposed mathematical model. The modeling results indicate the possibility of additional improvement of the parameters of the microwave antenna due to independent control of the shape and level of individual sections of distribution of excitation sources in its aperture. Thus, it becomes possible to optimize microwave antennas with directional characteristics of a given type at the design stage.

Keywords

• microwave antenna
• distribution of excitation sources
• radiation
• mathematical model
• radiation pattern