Investigation of the Accuracy of Linear Prediction of Radiating Elements Mutual Coupling Effects Depending on the Size...

The paper discusses the accuracy characteristics of theoretical methods for analyzing and predicting the mutual coupling effects of antenna array elements. A mathematical formalism is presented that makes it possible to describe distortions that occur in partial directivity patterns using a matrix of mutual coupling coefficients calculated with the pseudoinverse operation based on data on the directional properties of isolated antenna elements radiation obtained by experiment or simulation. In addition, a method for the theoretical calculation of these coefficients is shown based on another matrix that describes single signal re-radiations and can be found by analyzing an antenna array with a similar structure and a reduced number of radiators. A particular example of antenna elements in the form of half-wave dipoles is considered, from which a set of arrays of various sizes is formed and numerical modeling is performed, which makes it possible to investigate the dependence of the accuracy of the above linear models of mutual coupling on the number of elements in the antenna system.